How to increment a datetime by one day

Question

How to increment the day of a datetime   for i in range 1  35      date   datetime datetime 2003  8  i      print date    But I need pass through months and years correctly  Any ideas

User · Answer

Most Simplest solution  from datetime import timedelta  datetime date   datetime 2003 8 1 12 4 5  for i in range 5       date    timedelta days 1      print date

User · Answer

Here is another method to add days on date using dateutil s relativedelta  from datetime import datetime from dateutil relativedelta import relativedelta  print  Today    datetime now   strftime   d  m  Y  H  M  S    date after month   datetime now    relativedelta day 1  print  After a Days    date after month strftime   d  m  Y  H  M  S    Output   Today   25 06 2015 20 41 44 After a Days  01 06 2015 20 41 44

User · Answer

You can also import timedelta so the code is cleaner     from datetime import datetime  timedelta date   datetime now     timedelta seconds  delta value     Then convert to date to string  date   date strftime   Y- m- d  H  M  S     Python one liner is  date    datetime now     timedelta seconds  delta value    strftime   Y- m- d  H  M  S

User · Answer

Incrementing dates can be accomplished using timedelta objects   import datetime  datetime datetime now     datetime timedelta days 1    Look up timedelta objects in the Python docs  http   docs python org library datetime html

User · Answer

date   datetime datetime 2003 8 1 12 4 5  for i in range 5        date    datetime timedelta days 1      print date

User · Answer

All of the current answers are wrong in some cases as they do not consider that timezones change their offset relative to UTC  So in some cases adding 24h is different from adding a calendar day   Proposed solution  The following solution works for Samoa and keeps the local time constant   def add day today               Add a day to the current day       This takes care of historic offset changes and DST       Parameters     ----------     today   timezone-aware datetime object      Returns     -------     tomorrow   timezone-aware datetime object             today utc   today astimezone datetime timezone utc      tz   today tzinfo     tomorrow utc   today utc   datetime timedelta days 1      tomorrow utc tz   tomorrow utc astimezone tz      tomorrow utc tz   tomorrow utc tz replace hour today hour                                                minute today minute                                                second today second      return tomorrow utc tz   Tested Code    core modules import datetime    3rd party modules import pytz     add day methods def add day today               Add a day to the current day       This takes care of historic offset changes and DST       Parameters     ----------     today   timezone-aware datetime object      Returns     -------     tomorrow   timezone-aware datetime object             today utc   today astimezone datetime timezone utc      tz   today tzinfo     tomorrow utc   today utc   datetime timedelta days 1      tomorrow utc tz   tomorrow utc astimezone tz      tomorrow utc tz   tomorrow utc tz replace hour today hour                                                minute today minute                                                second today second      return tomorrow utc tz   def add day datetime timedelta conversion today         Correct for Samoa  but dst shift     today utc   today astimezone datetime timezone utc      tz   today tzinfo     tomorrow utc   today utc   datetime timedelta days 1      tomorrow utc tz   tomorrow utc astimezone tz      return tomorrow utc tz   def add day dateutil relativedelta today         WRONG      from dateutil relativedelta import relativedelta     return today   relativedelta days 1    def add day datetime timedelta today         WRONG      return today   datetime timedelta days 1      Test cases def test samoa add day               Test if add day properly increases the calendar day for Samoa       Due to economic considerations  Samoa went from 2011-12-30 10 00-11 00     to 2011-12-30 10 00 13 00  Hence the country skipped 2011-12-30 in its     local time       See https   stackoverflow com q 52084423 562769      A common wrong result here is 2011-12-30T23 59 00-10 00  This date never     happened in Samoa              tz   pytz timezone  Pacific Apia       today utc   datetime datetime 2011  12  30  9  59                                    tzinfo datetime timezone utc      today tz   today utc astimezone tz     2011-12-29T23 59 00-10 00     tomorrow   add day today tz      return tomorrow isoformat       2011-12-31T23 59 00 14 00    def test dst add day          Test if add day properly increases the calendar day if DST happens         tz   pytz timezone  Europe Berlin       today utc   datetime datetime 2018  3  25  0  59                                    tzinfo datetime timezone utc      today tz   today utc astimezone tz     2018-03-25T01 59 00 01 00     tomorrow   add day today tz      return tomorrow isoformat       2018-03-26T01 59 00 02 00    to test     add day dateutil relativedelta   relativedelta                add day datetime timedelta   timedelta                add day datetime timedelta conversion   timedelta conversion                add day   timedelta conversion dst    print     lt 25      gt 5     gt 5   format  Method    Samoa    DST    for method  name in to test      print     lt 25      gt 5     gt 5              format name                    test samoa method                     test dst method      Test results  Method                     Samoa   DST relativedelta                  0     0 timedelta                      0     0 timedelta conversion           1     0 timedelta conversion dst       1     1

User · Answer

A short solution without libraries at all       d    8 16 18  day value   d  d find      1  d find   18    tomorrow   f  d 0 d find         int day value  1  d d find   18   len d     format   print tomorrow    8 17 18   Make sure that  string d  is actually in the form of  m  d  Y so that you won t have  problems transitioning from one month to the next

User · Answer

This was a straightforward solution for me   from datetime import timedelta  datetime  today   datetime today   strftime   Y- m- d   tomorrow   datetime today     timedelta 1

[python] How to increment a datetime by one day?

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