Working with Dates in Python

dates.py

from datetime import datetime, date, timedelta, timezone, timestamp

# create today's date that's offset-aware--datetime.today() seems to do the same thing
now = datetime.now(timezone.utc)
# convert datetime object to formatted string
today = now.strftime('%Y/%m/%d')
# calling `.astimezone()` without a timezone object defaults to the local timezone
pdt = now.astimezone()

# turn date string into timestamp 
date = datetime.strptime('2023-06-30', '%Y-%m-%d')
# timestamp unit = seconds
timestamp = datetime.timestamp(date)

# turn date string into datetime object
# format code list: https://www.programiz.com/python-programming/datetime/strptime
date = datetime.strptime('2022/08/22', '%Y/%m/%d')
# make the datetime object offset-aware
date.replace(tzinfo=timezone.utc)

# create a custom date
date = datetime(2022, 9, 21, 0,0,0, tzinfo=timezone.utc)

# create the earliest datetime object that's offset-aware
min = datetime.min.replace(tzinfo=timezone.utc)

# calculate x days ago from today
date.today() - timedelta(days=400)
datetime.today() - timedelta(days=7)

# get the difference in days, seconds, or ms between two dates
date1 = datetime.today()
date2 = datetime.today() - timedelta(days=40)
# this will return a timedelta object, call diff.days, diff.seconds, or diff.microseconds to get the diff in those units
diff = date1 - date2

# convert datetime.date to timestamp
dt = datetime.combine(date.today(), datetime.min.time())
timestamp = datetime.timestamp(dt)

# convert datetime.datetime to timestamp
date = datetime.today()
timestamp = datetime.timestamp(date)

# convert timestamp to date
date = datetime.fromtimestamp(1557263690122)