Python Datetime Module - How to work with Dates, Times, Timedeltas, and Timezones

In python DateTime library is very useful for in program inside using date,time,month,dayofmonth,weekday, isoweekday

import datetime

d = datetime.date(2020,7,13)

print(d)

you can see output 2020-07-13  and you set in syntex in month set 07 you put syntex error.

if you knowing today local date

import datetime

tday = datetime.date.today()

print(tday)

In output you can see today's date.

import datetime

tday = datetime.date.today()

print(tday.day)                    <- here you can use month,day etc.

if you use date of the week it's two type

import datetime

tday = datetime.date.today()

print(tday.weekday())

print(tday.isoweekday())

you see in to the output 1 and 2

For weekday Moday is o and sunday is 6

For isoweekday is 1 and sunday is 7

Now create timedelta for one week away for 7 day

import datetime

tday = datetime.date.today()

tdelta = datetime.timedelta(days=7)

print(tday + tdelta)

In  output you can see date of 7 days

import datetime

tday = datetime.date.today()

tdelta = datetime.timedelta(days=7)

# print(tday + tdelta)

# date2 = date1 + timedelta

# timedelta = date1 + date2 

Let's take a example how many day until my birthday

import datetime

tday = datetime.date.today()

tdelta = datetime.timedelta(days=7)

# print(tday + tdelta)

# date2 = date1 + timedelta

# timedelta = date1 + date2 

bday = datetime.date(1999,6,6)

till_bday = bday - tday()

print(till_bday)     <- you can know which between day print(till_bday)  <- you can know which second in your between birthday  print(till_bday.total_seconds())

as you can see as a date now you can see for time 

import datetime

t = datetime.time(9,10,45,10000)    <- (hour,minutes,second,microseconds)

print(t)   <-in you  can only print hour you just add print(t.hour)

You can see output like 09:10:45.10000

You can access date and time with hour minutes second without date.time use you can access both 

import datetime

dt = datetime.datetime(2020,7,13,9,10,45,10000)  <- in this as your choice you can access only date print(dt.date())

You can see the output with date and with time

PYTZ:

import datetime

import pytz

dt = datetime.datetime(2020,7,13,10,27,50,tzinfo=pytz.UTC)

print(dt)

You can seet output like 2020-07-13 10:27:50 +00.00

dt_now = datetime.datetime.now(tzinfo=pytz.UTC)

print(dt_now)      Now you can see current datetimezone

dt_utcnow = datetime.datetime.utcnow().replace(tzinfo=pytz.UTC)

print(dt_utcnow)

How can you convert into many timezone🤔:

import datetime

import pytz

dt_utcnow = datetime.datetime.now(tzinfo=pytz.UTC)

print(dt_utcnow)

dt_mtn = dt_utcnow.astimezone(pytz.timezone('US/Mountain'))

print(dt_mtn)

Now you can see output

import datetime

import pytz

dt_utcnow = datetime.datetime.now(tzinfo=pytz.UTC)

#print(dt_utcnow)

dt_mtn = dt_utcnow.astimezone(pytz.timezone('US/Mountain'))

#print(dt_mtn)

for tz in pytz.all.timezones:

    print(tz)

->OUTPUT:-Now you can see all time zone in the us

import datetime

import pytz

dt_utcnow = datetime.datetime.now(tzinfo=pytz.UTC)

print(dt_utcnow)

dt_mtn = dt_utcnow.astimezone(pytz.timezone('US/Mountain'))

print(dt_mtn)

Create New Local time zone doesn't have time zone information

import datetime

import pytz

dt_utcnow = datetime,datetime.now(tzinfo=pytz.UTC)

print(dt_utcnow)

dt_mtn = datetime.datetime.now()

print(dt_mtn)                               <- You run this program but you can't see time zone only you can see time perticular run time now next step to do.

import datetime

import pytz

dt_utcnow = datetime,datetime.now(tzinfo=pytz.UTC)

print(dt_utcnow)

dt_mtn = datetime.datetime.now()

# dt_east = dt_mtn.astimezone(pytz.timezone('US/Eastern'))   <-In for example you know east timezone so put like that command put you threw error when you run a program. so this code commented because this function compiler error thru call locally function.

mtn_tz = pytz.timezone('US/Mountain')

dt_mtz = mtz_tz.localize(dt_mtn)   <- USing this command now you can see inside output timezone

print(dt_mtn)

Now you can uncomment command and try to run command

import datetime

import pytz

dt_utcnow = datetime,datetime.now(tzinfo=pytz.UTC)

print(dt_utcnow)

dt_mtn = datetime.datetime.now()

dt_east = dt_mtn.astimezone(pytz.timezone('US/Eastern'))  <- Uncomment this command

mtn_tz = pytz.timezone('US/Mountain')

dt_mtz = mtz_tz.localize(dt_mtn)

print(dt_east)

#print(dt_mtn)

Best Way to writing code for datetime:-

import datetime

import pytz

dt_mtn = datetime,datetime.now(tzinfo=pytz.timezone('US/Mountain'))

#print(dt_mtn.strftime('%B  %d,%Y'))  <-You can see output like july 26,2020

You print as string datetime you can see like this  Strftime -- Date time to String

dt_str ='july 26,2020

dt = datetime.datetime.strptime(dt_str,'%B  %d,%Y')

print(dt)

Strftime -- Date time to String

Strptime -- String to Datetime