Calendar module in Python

Creating Calendar object

import calendar
my_cal= calendar.Calendar()

Creating Yearly and monthly Calendar using Python with option to set first weekday

import calendar
print(calendar.calendar(2020, w=1, l=1, c=3, m=3))

				2020

      January                February                March
Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su
       1  2  3  4  5                   1  2                      1
 6  7  8  9 10 11 12    3  4  5  6  7  8  9    2  3  4  5  6  7  8
13 14 15 16 17 18 19   10 11 12 13 14 15 16    9 10 11 12 13 14 15
20 21 22 23 24 25 26   17 18 19 20 21 22 23   16 17 18 19 20 21 22
27 28 29 30 31         24 25 26 27 28 29      23 24 25 26 27 28 29
                                              30 31

       April                   May                    June
Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su
       1  2  3  4  5                1  2  3    1  2  3  4  5  6  7
 6  7  8  9 10 11 12    4  5  6  7  8  9 10    8  9 10 11 12 13 14
13 14 15 16 17 18 19   11 12 13 14 15 16 17   15 16 17 18 19 20 21
20 21 22 23 24 25 26   18 19 20 21 22 23 24   22 23 24 25 26 27 28
27 28 29 30            25 26 27 28 29 30 31   29 30

        July                  August               September
Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su
       1  2  3  4  5                   1  2       1  2  3  4  5  6
 6  7  8  9 10 11 12    3  4  5  6  7  8  9    7  8  9 10 11 12 13
13 14 15 16 17 18 19   10 11 12 13 14 15 16   14 15 16 17 18 19 20
20 21 22 23 24 25 26   17 18 19 20 21 22 23   21 22 23 24 25 26 27
27 28 29 30 31         24 25 26 27 28 29 30   28 29 30
                       31

      October                November               December
Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su   Mo Tu We Th Fr Sa Su
          1  2  3  4                      1       1  2  3  4  5  6
 5  6  7  8  9 10 11    2  3  4  5  6  7  8    7  8  9 10 11 12 13
12 13 14 15 16 17 18    9 10 11 12 13 14 15   14 15 16 17 18 19 20
19 20 21 22 23 24 25   16 17 18 19 20 21 22   21 22 23 24 25 26 27
26 27 28 29 30 31      23 24 25 26 27 28 29   28 29 30 31
                       30

In our calendar the first day of the week is Monday ( default value ) .
We can read the first week day value and update the same also.

Firstweekday() and setfirstweekday() of calendar

Present Year calendar

We can use datetime to get current year value.

from  datetime import date
current_year=date.today().year
#current_month=date.today().month

import calendar
print(calendar.calendar(current_year))

Present Year Month calendar

from  datetime import date
current_year=date.today().year
current_month=date.today().month

import calendar
print(calendar.month(current_year,current_month, w=1, l=1))

     July 2020
Mo Tu We Th Fr Sa Su
       1  2  3  4  5
 6  7  8  9 10 11 12
13 14 15 16 17 18 19
20 21 22 23 24 25 26
27 28 29 30 31

firstweekday	Get and set first week day of the calendar
iterweekdays	Iterrator of week days
itermonthdates	date object of the month including previous and next week
itermonthdays	days of the month including previous and next week
itermonthdays2	tuple with days of the month and week day number
itermonthdays3	tuple with days , month and year numbers
itermonthdays4	tuple with days , month year and week number
monthdatescalendar	List of full weeks with date objects of a Month
monthdays2calendar	List of weeks with day & week day as tuple for a Month
monthdayscalendar	List of full weeks with 7 days numbers for a Month
yeardatescalendar	List of month with full weeks with 7 date object
yeardays2calendar	List of month with full weeks with 7 days tuple
yeardayscalendar	List of month with full weeks with 7 days items

calendar.TextCalendar class

Methods of this class is here.

formatmonth	Monthly calendar as multi-line string
prmonth	Print Monthly calendar as multi-line string
formatyear	Yearly calendar as multi-line string
pryear	Print yearly calendar as multi-line string

calendar.HTMLCalendar class

Methods of this class is here.

formatmonth	Monthly calendar using HTML tags
formatyear	Yearly calendar using HTML tags
formatyearpage	Yearly calendar Web page using HTML tags

This module provide more functions for our use.

isleep(year)

Returns Boolean ( True or False ) based on the input year is leap year or not

import calendar
print(calendar.isleap(2012)) # True

Using for loop to check many years

import calendar
for x in range (2010,2021):
    print(x,calendar.isleap(x))

Output

2010 False
2011 False
2012 True
2013 False
2014 False
2015 False
2016 True
2017 False
2018 False
2019 False
2020 True

leapdays(year1,year2)

Number of leap years between range of input years ( year1 and year2 )

import calendar
print(calendar.leapdays(2010,2021)) # 3

weekday(year,month,day)

Returns the number of week day of the input date ( in year , month and day format ). It returns 0 for Monday, 1 for Tuesday ... and 6 for Sunday.

import calendar
print(calendar.weekday(2010,12,31))  # 4

weekheader(n)

Returns header of abbreviated weekday names. n here is the width of chars for each weekday name to be used. By using n value as 1, 2,3,9 we can get different abbreviated names of the weekdays.

import calendar
print(calendar.weekheader(1)) # use 9,3,2,1

Output

M T W T F S S

print(calendar.weekheader(9))

Output

Monday   Tuesday  Wednesday  Thursday   Friday   Saturday   Sunday

monthrange(year,month)

Returns a tuple having weekday number of first day of the month and number of days in the month. Inputs are year and month for which details are returned.

import calendar
print(calendar.monthrange(2020,7)) # (2,31)

For month July of year 2020 , the weekday number for first day of the month is 2 ( Wednesday ) and there are 31 days in the month.

import calendar
x=calendar.monthrange(2020,7)
print("First weekday:",x[0], ", Total Days ",x[1])

Output

First weekday: 2 , Total Days  31

monthcalendar(year,month)

Returns a matrix having each week as row. Days outside the month are returned as 0.

import calendar
print(calendar.monthcalendar(2020,7))

Output

[[0, 0, 1, 2, 3, 4, 5], [6, 7, 8, 9, 10, 11, 12], [13, 14, 15, 16, 17, 18, 19],
 [20, 21, 22, 23, 24, 25, 26], [27, 28, 29, 30, 31, 0, 0]]

By default the week starts with Monday. Can be changed by using setfirstweekday

import calendar
calendar.setfirstweekday(3)
print(calendar.monthcalendar(2020,7))

Output

[[0, 0, 0, 0, 0, 0, 1], [2, 3, 4, 5, 6, 7, 8], [9, 10, 11, 12, 13, 14, 15], [16, 17, 18, 19, 20, 21, 22], [23, 24, 25, 26, 27, 28, 29], [30, 31, 0, 0, 0, 0, 0]]

prcal(year, w=0, l=0, c=6, m=3)

print year calendar as returned by calendar() ( check code above )

timegm(tuple)

tuple is the input year, month, day and time. We get timestamp assuming an epoch of 1970 as output.
Get all details about Timestamp and generate timestamp
by using Calendar and time sliders.

import calendar
print(calendar.timegm((2020,7,30,12,12,35)))

Output

1596111155

By using above timestamp we can get the correspoding date and time. We will use fromtimestamp()

import calendar
x=calendar.timegm((2020,7,30,12,12,35))

from datetime import datetime

print("Present Timestamp : ",x)
dt=datetime.fromtimestamp(x)
print(dt)

Output ( + 5:30 for localtime )

Present Timestamp :  1596111155
2020-07-30 17:42:35

calendar.month_name

Array of list of local month names

x=calendar.month_name
for i in x:
    print(i,' ',end='')

January  February  March  April May  June 
July  August September  October  November  December

calendar.month_abbr

Array of list of local abbreviated months

x=calendar.month_abbr
for i in x:
    print(i,' ',end='')

Jan  Feb  Mar  Apr  May  Jun  Jul  Aug  Sep  Oct  Nov  Dec

calendar.day_name

Array of list of day names

x=calendar.day_name
for i in x:
    print(i,' ',end='')

Monday  Tuesday  Wednesday  Thursday  Friday  Saturday  Sunday

calendar.day_abbr

Array of list of day abbreviated names

x=calendar.day_abbr
for i in x:
    print(i,' ',end='')

Mon  Tue  Wed  Thu  Fri  Sat  Sun

Date functions
max() Bitwise operators using hash() int() float()

All String methods tuple Python- Tutorials

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