Python convert dates to integer. date2num doesn't seem to work as per below.

Python convert dates to integer From simple timestamp conversions to custom integer representations, the method you choose depends on your specific requirements for readability, precision, and performance. date instance); this makes dealing with timestamps that differ slightly less than a multiple of 24 hours easier. I am not able to find anything which could help me to extract the difference in terms of number of days. For seconds, there is timedelta. fromtimestamp () Aug 26, 2018 · How to convert datetime64 array to int? Asked 7 years, 2 months ago Modified 4 years, 11 months ago Viewed 18k times Aug 6, 2015 · I have this list of integers and need to convert it to date using python. 0 733829. The Excel "serial date" format is actually the number of days since 1900-01-00 i. Jul 21, 2023 · The manipulation of date and time values is a crucial aspect of programming, and the Python language provides a useful built?in module called datetime for this purpose. See this question/answer; Get timezone used by datetime. In this article, we will explore the concept of converting DateTime to integer in Python 3 programming, along with examples and related evidence Mar 17, 2012 · 44 I am creating a module in python, in which I am receiving the date in integer format like 20120213, which signifies the 13th of Feb, 2012. datetime to an excel serial date number. In Excel, dates are serialized so they can be used in calculations. To convert integer to DateTime type datetime64[ns] format by using pandas. 608757000") Next, what kind of integer or float representation do you want? you can use . Assume you have a pandas DataFrame with a datetime column such as 2023-01-01 00:00:00 and you wish to convert it to an integer timestamp like 1672531200. This function takes the timestamp as input and returns the datetime object corresponding to the timestamp. Jan 15, 2019 · Considering a pandas dataframe in python having a column named time of type integer, I can convert it to a datetime format with the following instruction. , user IDs, invoice numbers), aligning data in reports, or creating timestamps (e. to_datetime (df ['datetime_column']). date () to extract just the date portion (result is a datetime. Apr 12, 2021 · If your dates are in string format you can convert them to datetime and use timestamp method to get your date in the float format: Mar 31, 2024 · Dealing with Excel Date Formats Excel stores dates as floating-point numbers, where the integer part represents the number of days since January 1, 1900, and the fractional part represents the time of day as a fraction of 24 hours. >>> date. Oct 10, 2024 · The base date for Excel's serial number system is "1899-12-30" (for compatibility reasons), so we can use this as the starting point to convert Excel's numeric values to proper DateTime values in Pandas. this is a division, which in python always gives a float, so you might need to convert/display as int manually. Using pandas. Feb 18, 2024 · Problem Formulation: In Python, developers often face the challenge of converting integers representing time (such as Unix timestamps) into datetime objects for better manipulation and readability. min_exposure_date)) The format for the columns are datetime64 [ns]. date` object Source code: Lib/datetime. I also added calls to . Whether you’re logging events, analyzing time-series data, or building scheduling applications, you’ll often encounter `datetime` objects. e. I can't find this anywhere in the Python help. How can I convert the dates back to date format? 5/15/2015 is coming as 42139. 0 733835. The strftime () function is used to convert date and time objects to their string representation. To get the same absolute value no matter which direction the subtraction happens, we can get the timedelta in total seconds and convert that number into number of days by dividing it by 24*3600 (total number of seconds in a day) and convert to an integer. Oct 25, 2021 · To convert it to integer, I guess that first converting it to a string and then to an integer would work properly. month + dt_time. How do I convert this number to a datetime? I want to convert a date into the number of that day of the year. datetime64 object to a datetime. toordinal() 737809 >>> date May 3, 2024 · Learn how to work with date and time values in Python using built-in modules like Datetime, Time, Calendar, and DateUtil. For example, converting the integer 1609459200 to a date should yield the date January 1, 2021. Anyone? Thanks. to_datetime(df. This function attempts to parse the entire string as a base-10 integer. Dec 22, 2018 · It seemed to me as well that the values are out of range. 3333333333. year + 100*dt_time. 7 has a total_seconds() function. For example, the excel serial date number 43831 represents January 1st, 2020, and after converting 43831 to a DateTime becomes 2020-01-01. total_seconds() to see the number of seconds between the two datetime objects. This method is best Feb 5, 2024 · Python Reader Apr 29, 2025 · In Python, you can convert a string (str) to a number using int() for an integer or float() for a floating-point number. 000002015 1970-01-01 00:00:00 Jul 10, 2009 · How can I convert an Excel date (in a number format) to a proper date in Python? Oct 24, 2021 · I have a dataframe with tickers, returns, and dates in the format, for example, of "20200101". Syntax of pd. In this article, we will explore the concept of converting DateTime to integer in Python 3 programming, along with examples and related evidence Jul 23, 2025 · We can convert a datetime object to a timestamp using the built-in timestamp () method, and then round or typecast it to get an integer version. Let's learn how to efficiently convert a column to an integer in a Pandas DataFrame Convert DataFrame Column to Integer - using astype () Method astype () method is simple and direct, ideal when you are confident all values can be converted. time May 4, 2021 · How do you convert a pandas dataframe column from a date formatted as below to a number as shown below: date 0 4/5/2010 1 9/26/2014 2 8/3/2010 To this date newForma Aug 11, 2024 · These techniques will help you handle different date formats in your Python projects. dtypes Out[99]: date int64 DateTime datetime64[ns] dtype: object EDIT Actually it's quicker to convert the type to string and then convert the entire series to a datetime rather than calling apply on every value: May 15, 2015 · I am reading data from excel and manipulating the data using python. It then forms a datetime object (DateTime) using the year, month, and day components from MyDate, with the default time set to midnight. Jul 5, 2017 · I have a date column in my pandas dataframe in the form of YYYY-MM-DD, I need to convert this to a integer in the form YYYYMMDD. Jan 27, 2015 · data. Nov 14, 2020 · Converting Date Difference to Integer [duplicate] Asked 4 years, 5 months ago Modified 4 years, 5 months ago Viewed 781 times Sep 30, 2017 · If you are storing datetime. However, when reading Excel files in Python, the dates are often displayed as strings or formatted differently. Is it possible to use 'datetime. 42222 should be 8/6/2015 42290 should be 10/13/2015 42319 should be 11/11/2015 I get the equal date of the integer when i Nov 13, 2025 · In Python, converting an integer to a string is a common task, but sometimes you need more control over the output—specifically, ensuring the resulting string has a fixed length with leading zeros if the integer is too short. Jul 23, 2025 · Converting DataFrame columns to the correct data type is important especially when numeric values are mistakenly stored as strings. Oct 10, 2017 · I know this an old question but, there's a catch when converting int to datetime, when the type of the data is int64 it will result in wrong parsing. I wrote the following function to convert from a python datetime object into an Excel serial number: You can use the fromtimestamp function from the datetime module to get a date from a UNIX timestamp. Is this possible using datetime? Oct 1, 2021 · How to convert Timestamp Dates into Integer Values Asked 4 years, 1 month ago Modified 4 years, 1 month ago Viewed 15k times Feb 28, 2018 · How can I convert any date to just number of days? This is what I tried: import datetime import calendar def leap_day_counter(yr): leap_days = 0 # since 1582 11 days are missing if yr Dec 16, 2014 · In [99]: df. I'm trying to convert these values to Datetime values. the date 7/15/2022 when imported is automatically converted to the value 44757 and similarly the date 7/14/2022 when imported gets automatically converted to the value 44756 Jun 25, 2021 · 0 I used pd. But dates are coming as integers. Try this code out: int(str(datetime. However, it often comes with type-related challenges, especially when interacting with Python’s native `datetime` module. Nov 21, 2018 · I have to parse an xml file which gives me datetimes in Excel style; for example: 42580. datetimt64 or date string), origin is set to Timestamp identified by origin. to_datetime() function. How can I get the month name from the month number? For instance, if I have 3, I want to return march date. Parameters: ts_inputdatetime-like, str, int, float Sep 14, 2021 · This article will discuss the conversion of an excel serial date to DateTime in Python. date2num doesn't seem to work as per below import pandas as pd import matp How to convert an integer timestamp into a datetime using the Python programming language - fromtimestamp() & Pandas to_datetime() Functions Aug 9, 2016 · Convert number to date format using Python Asked 9 years, 3 months ago Modified 9 years, 3 months ago Viewed 16k times Jul 23, 2025 · This article will discuss the conversion of a python datetime. I am looking to subtract one column from another and the result being the difference in numbers of days as an integer. The Excel "serial date" format is actually the number of days since 1900-01-00. to_numeric (df['dates'], downcast = 'integer') to convert a datetime64 to int64 but if I want to convert it back to datetime format, what should I do? Earlier it was in format: 2020-02-19 but after conversion it is now 1582070400000000000. So to convert the given date to integer, we 2 days ago · In Python, the `datetime` module is a powerful tool for working with dates and times. timedelta)) Jun 15, 2016 · I have two columns in a Pandas data frame that are dates. Python has strong tools and packages that simplify handling date and time conversions. Timestamp is the pandas equivalent of python’s Datetime and is interchangeable with it in most cases. from datetime import datetime, timedelta def from_excel_ordinal(ordinal: float, _epoch0=datetime(1899, 12, 31)) -> datetime: if ordinal >= 60: Jul 2, 2015 · I would like to extract a week number from data in a pandas dataframe. I can't find a way to revert it back to datetime64. Is there a way to do this? Oct 5, 2010 · So you have the datetime module, which has a datetime. While date and time arithmetic is supported, the focus of the implementation is on efficient attr Jan 1, 2017 · Pandas replacement for python datetime. fromordinal() and datetime. This article will examine how to effectively manipulate and format date and time values in Python by converting Strings to Datetime objects and back. fromtimestamp() and a few others, but nothing matches. I want to extract the number of days in the field 'datedif'. 0 733832. Aug 14, 2018 · I have a column 'start_date' which is an integer 37823. It has a rich set of functions used to perform almost all the operations that deal with time. total_seconds(). , datetime. If a float or integer, origin is the difference (in units determined by the unit argument) relative to 1970-01-01. to_datetime (df['DataFrame Column'], format=specify your format) Create the DataFrame to Convert Integer to Datetime in Pandas Check data type for the 'Dates' column is Integer. For instance, you may have an integer ‘1617181723’ which you want to convert into a human-readable date and time format like ‘2021-03-30 23:42:03’. So Jan 1 would be 1, Dec 31 would be 365, etc. Convert Unix Timestamps (and many other date formats) to regular dates. days' or do I need to do somet Mar 31, 2021 · For example, I have the int 043017, which I want converted to 04/30/17 (April 30, 2017), I want to be able to convert any int of that format into datetime, how can this be accomplished? 2 days ago · Working with time series data in Pandas is a common task for data analysts and scientists. days to get the number of days as an integer, or date1. datetime(2023, 3, 14, 15, 9, 26)), and the desired output is an integer timestamp representing the number of seconds since the Unix epoch (e. and so on And then if the Jul 23, 2025 · Working with date and time data in a Pandas DataFrame is common, but sometimes dates are stored as strings and need to be converted into proper date formats for analysis and visualization. In this article, we will explore multiple methods to convert string data to date format in a Pandas DataFrame. 0 733841. I had the same situation when trying to convert a list of Years as int64, it would result into: pd. Does Pandas provide a way to convert that number into a regular datetime object? Jan 19, 2023 · I assume this timestamp is a string? Use dateutil to parse it: import dateutil. I updated the code as: 'pd. 2012-3-16), but not much more. The input would be a Python datetime object (e. I'm pretty sure that particular number corresponds to the current date (e. datetime. datetime object. For instance, from the input 2023, the desired output is a datetime object that represents January 1, 2023. Learn how to convert timestamp to date in Python, PHP, JavaScript, Bash, date1 is a timedelta object - use date1. . Date objects may be converted to datetime64 in order to get the resolution required for a numeric representation, but these may not be converted to floating-point values, so the intermediate step of converting to int is necessary. apply(pd. Dec 4, 2012 · How do I convert a numpy. cachebool, default Mar 31, 2017 · I have following dataframe. While date and time arithmetic is supported, the focus of the implementation is on efficient attr Jun 18, 2020 · I have some of the date fields represented as 5-digit numbers. day : # Or take the appropriate chars from a string date representation. Remember to check the Python docs for format codes when using strftime () and strptime () to make sure you’re using the right codes for your date conversions. But when I tried to convert them to 'float' , I got the following error: could not convert string to float: '2018-02-15 14:28:08' I guess I forgot to convert the column to 'datetime' before converting it to 'int'. parse("2021 21:35:18. And there is a mapping from the numbers to an actual date. Feb 12, 2014 · In [1]: import datetime In [2]: %cpaste Pasting code; enter '--' alone on the line to stop or use Ctrl-D. This happened when I used xlrd library to convert xlsx to csv. It needs to be imported first to use the functions and it comes along with python, so no need to install it separately. exposuredate)-(data. :def to_integer(dt_time): : return 10000*dt_time. g. This is crucial for formatting consistency in scenarios like generating IDs (e. 0 733836. Jul 11, 2025 · A common necessity in many programming applications is dealing with dates and times. It’s the type used for the entries that make up a DatetimeIndex, and other timeseries oriented data structures in pandas. The date format is datetime64[ns] I have normalized the date to remove the time from it df['Date'] = df['Date']. 39 I need to convert dates into Excel serial numbers for a data munging script I am writing. 0 733840. datetime (or Timestamp)? In the following code, I create a datetime, timestamp and datetime64 objects. 0. A peek at the dat Dec 3, 2022 · Working code We modify the function from How to convert a given ordinal number (from Excel) to a date by Martijn Pieters to convert from 5 digit Excel to the desired date format. strptime () method on it. For example, converting 01:01:09 to seconds will give 3669. Here, we deal with a special date object. id int_date 1 20160228 2 20161231 3 20160618 4 20170123 5 20151124 How to convert above date in int format to date format of mm/dd/yyyy? Want this in I've tried Python's standard datetime. astype (np. How to convert a date and time object to an integer in the Python programming language - datetime module - 3 examples Aug 5, 2024 · Working with dates and times is a common task in programming, and Python provides a powerful module called datetime to handle such operations. datetime, np. This conversion is often a requirement when handling date-time data in Python programs. Method 1: Using datetime. By playing with dates in my OpenOffice Calc workbook, I was able to deduce that '1-Jan 1899 00:00:00' maps to the number zero. Mar 12, 2018 · I am working on a regression problem, the data is presented as a csv file of three columns where the second columns contains the dates, I want to convert the date ( format: 1/1/2015 12:00:00 ) into an int (112015120000) in order to be able to normalize and apply my model. # Python3 code to calculate age in years import datetime from datetime import date date_entry = input ('Enter your birthdate in YYYY/MM Dec 6, 2018 · 306 For the special date of January 1, 1970 there are multiple options. import datetime import numpy as np Mar 19, 2022 · I'am trying to convert a date to an integer for a comparison. replace () In this method, we start with a Sep 11, 2025 · Convert String to Int means changing a value written as text (string) into a number (integer) so you can do math with it. It consists of classes and methods that can be used to work with data and time values. 0 733839. Mar 5, 2014 · I need to convert a date in string format to a number: time = '2014-03-05 07:22:26. date objects in your column, conversion directly to float will fail. to_datetime () This is the most commonly used method to convert string dates into Jun 12, 2025 · We are given a datetime object and our task is to convert it into seconds. Nov 20, 2018 · I have a date-frame (df) which the head looks like: DATE BBG FLAG DATE_DIFF 0 2014-03-04 A 0 NaT 1 2014-04-04 B 1 31 days 2 2014-04-07 C 0 3 days 3 20 Feb 18, 2024 · Problem Formulation: When dealing with Excel data in Python, it’s common to encounter date values represented as serial date integers. There are various approaches to converting DateTime to an integer Feb 18, 2024 · Problem Formulation: Converting an integer representing a date, such as ‘20230101’ for January 1, 2023, into a Python datetime object is a common task in data processing. , January 1st, 1900. However, when I attempt the following: Sep 1, 2020 · All the dates can't be parsed in the same manner Load the dataframe Cast the dates column as a str if it's not already. 0 733834. 976637+00:00' type (time) str I would like to convert this date to a unique nu Feb 18, 2024 · Problem Formulation: In Python programming, it is common to encounter situations where you have an integer value representing a date in a specific format, such as a Unix timestamp, and you need to convert it into a human-readable date object. Required library import datetime The datetime. This is useful in time-based calculations like measuring duration, intervals, or storing timestamps in a simplified format. 2 days ago · In this blog, we’ll walk through a step-by-step guide to convert integer dates (YYYYMMDD) to the more readable `mm/dd/yyyy` format using Python’s Pandas library. 0 733833. Feb 18, 2024 · Problem Formulation: Converting datetime objects to integers in Pandas is a common task, whether to perform numerical operations or for compatibility with machine learning algorithms. This is quite useful when you want the time to be in Coordinated Universal Time (UTC) rather than in local time. datetime class, which in turn has a datetime. One frequent frustration is the `unsupported operand type(s) for -` error, which occurs when trying to subtract a Pandas `DatetimeIndex` element from a Python `datetime. In this article, we'll learn how to convert a Python datetime object into an integer timestamp-either in seconds or milliseconds. 0 These numbers correspond to some Jul 15, 2025 · Let's discuss how to convert an Integer to Datetime in it. Mar 17, 2021 · I have a date column in a pandas dataframe in the format mm/dd/yyyy and I would like to convert it to an integer in the format yyyymmdd. May 29, 2025 · Discover multiple ways to convert integers to datetime in Python, including Unix timestamps, milliseconds, and custom formats, ideal for data analysis. I have been at it for a long time now and can't find a simple solution. Jul 23, 2025 · Convert Date To Datetime In Python Using datetime () In this example, below Python code imports necessary datetime modules and creates a date object (MyDate) representing April 3, 2004. Hence '2003/07/21' got converted to 37823. date(2012, 6, 13)) Out[3]: 20120613 If you also want minutes and seconds, then just include further Jul 23, 2025 · Python provides a module called DateTime to perform all the operations related to date and time. However, there are situations where it becomes necessary to convert a DateTime object into an integer value. Now, I want to convert this integer formatted date into a python date object. However, in certain situations, it may be necessary to convert a DateTime object into an integer value in order to perform specific operations or calculations. I I would like to create a column in a pandas data frame that is an integer representation of the number of days in a timedelta column. I have gone through xlrd documenta Jun 25, 2025 · In Pandas, you can convert an integer column representing dates or times into a DateTime type using the pd. toordinal() to get the number of days since the start of common era time reckoning, or . read_excel ('File path') it treats the date column as an integer value and displays an integer instead of date time for ex. Use Boolean Indexing to select different date types Assuming regular dates contain a / Assuming Excel serial dates do not contain a / Fix each dataframe separately based on its datetime type Concat the dataframes back together. For any other starting date you need to get the difference between the two dates in seconds. If Timestamp convertible (Timestamp, dt. min_exposure_date = pd. 00 Aug 22, 2022 · Now when I use the pd. Jul 12, 2025 · In different regions of the world, different types of date formats are used and for that reason usually, programming languages provide a number of date formats for the developed to deal with. to_datetime () method), but here, we need to convert the datetime type value to integer timestamp value. Using total_seconds () We create a datetime object, subtract it from a reference point to get a timedelta and convert it to seconds I have date strings like this: 'January 11, 2010' and I need a function that returns the day of the week, like 'mon', or 'monday' etc. In Python, it is dealt with by using a liberty called DateTime. min_exposure_date) data['datedif'] = ((data. Apr 17, 2023 · This program converts a day number and year into a date using the datetime module in Python. Feb 18, 2024 · To convert an integer timestamp into a UTC datetime object, Python’s datetime module has the utcfromtimestamp() function. Well, when converting TO unix timestamp, python is basically assuming UTC, but while converting back it will give you a date converted to your local timezone. g Jun 20, 2025 · Conclusion Converting datetime to integer in Python is a versatile operation with multiple approaches, each suited to different needs and scenarios. first_valid_index - It returns a the date time of the first non nan which is what I'm looking for how Mar 24, 2015 · When you subtract 2 datetimes you get a timedelta object from this: time_left - time_entered Source code: Lib/datetime. g Feb 18, 2024 · Problem Formulation: You are given an integer representing a year and need to convert it into a datetime object in Python. parser. Now to convert Integers to Datetime in Pandas DataFrame. tm_month() How to get the string march? Oct 3, 2023 · Suppose we are given a DataFrame with some integer in the date format, we know how to convert these values in datetime format (using pandas. Aug 5, 2024 · Working with dates and times is a common task in programming, and Python provides a powerful module called datetime to handle such operations. :-- In [3]: to_integer(datetime. However I can't figure out what logic should be applied to convert the numb Sep 28, 2018 · If I have a dataframe that has a datetime index and I get the first valid index by using series. py The datetime module supplies classes for manipulating dates and times. Subtracting two dates gives a timedelta object, which as of Python 2. parser date = dateutil. to_datetime df['DataFrame Column'] = pd. However, many workflows require converting these objects into integers—for example, to store timestamps in databases, perform arithmetic operations, or integrate Feb 28, 2024 · Problem Formulation: In Python, one might need to convert datetime objects into integer timestamps for various purposes, such as database storage, comparison, or arithmetic operations. to_datetime(data. dates. astype() method is used to cast from one type to another. Using int () Function The simplest way to convert a string to an integer in Python is by using the int () function. Convert timestamp to date or date to timestamp easily. In this article, we’ll go over converting an integer that represents a serialized Excel date into a Python datetime object. com title: a beginner's guide to converting dates to integers in python introduction: in python programming, there are often scenarios where I want to find out the following: given a date (datetime object), what is the corresponding day of the week? For instance, Sunday is the first day, Monday: second day. int64)' and the conversion is working fine. timestamp() to get a POSIX timestamp as float. Dec 21, 2021 · How can I convert a datetime into a floating point representation that is used by matplotlib's x-axis? matplotlib. It adjusts the day number and initializes a start date, and then adds the number of days to the start date using timedelta (). to_datetime () and astype () methods. datet Instantly Download or Run the code at https://codegive. fromtimestamp Python and Matlab quite often have integer date representations as follows: 733828. import pandas as pd from datetime import Aug 18, 2022 · NB. Julian day number 0 is assigned to the day starting at noon on January 1, 4713 BC. Year, format='%Y') Year 1970-01-01 00:00:00. mfsy ivde woammaf uwoua gmb inzsu kgua lijuwxx dnf oyrv ugazod maetk apg tdmzyiy qiqp