In this article, we will learn how to add or subtract a month from a given date to get a specific date in python. In python, there is no built-in function to add or subtract a month from a given date to get a specific date. So here we see how to add or subtract a month from a given date to get a specific date using the standard Python library.
Here is the source code to add or subtract a month from a given date to get a specific date in python.
In this example, d represents a DateTime and x represents a Number of Months and the value of x can be positive(+) or negative(-).
# Import Module
import datetime
import calendar
def addMonths(d, x):
newday = d.day
newmonth = (((d.month - 1) + x) % 12) + 1
newyear = d.year + (((d.month - 1) + x) // 12)
if newday > calendar.mdays[newmonth]:
newday = calendar.mdays[newmonth]
if newyear % 4 == 0 and newmonth == 2:
newday += 1
return datetime.date(newyear, newmonth, newday)
print("\n Add N Months to a Specific Date: ", addMonths(datetime.datetime(2020,1,30),1))
# Add N Months to a Specific Date: 2020-02-29
print("\n Add N Months to a Specific Date: ", addMonths(datetime.datetime(2019,1,30),1))
# Add N Months to a Specific Date: 2019-02-28
print("\n Add N Months to a Specific Date: ", addMonths(datetime.datetime(2020,12,30),1))
# Add N Months to a Specific Date: 2021-01-30
print("\n Add N Months to a Specific Date: ", addMonths(datetime.datetime(2020,1,30),-1))
# Add N Months to a Specific Date: 2019-12-30
print("\n Add N Months to a Specific Date: ", addMonths(datetime.datetime(2020,2,29),-6))
# Add N Months to a Specific Date: 2019-08-29
print("\n Add N Months to a Specific Date: ", addMonths(datetime.datetime(2020,2,29),-16))
# Add N Months to a Specific Date: 2018-10-29
I hope this article will help you to understand how to add or subtract a month from a given date to get a specific date in python.
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