from datetime import datetime

s = "2024-03-15"
dt = datetime.strptime(s, "%Y-%m-%d")
print(dt)


2. Extract year, month, day from datetime

from datetime import datetime

dt = datetime(2023, 11, 5, 14, 22, 10)

print(dt.year)   # 2023
print(dt.month)  # 11
print(dt.day)    # 5


from datetime import datetime, timedelta

d = datetime(2024, 1, 20)
d2 = d + timedelta(days=10)
print(d2)   # 2024-01-30


4. Find difference in days between two dates

from datetime import datetime

d1 = datetime(2024, 3, 1)
d2 = datetime(2024, 2, 10)
diff = (d1 - d2).days
print(diff)  # 20


from datetime import datetime

dt = datetime.strptime("2024-05-11 18:30", "%Y-%m-%d %H:%M")
formatted = dt.strftime("%d-%b-%Y %I:%M %p")
print(formatted)


from datetime import datetime

dt = datetime(2025, 1, 1)
print(dt.strftime("%A"))   # Wednesday


7. Create a list of dates between two dates

from datetime import datetime, timedelta

start = datetime(2024, 1, 1)
end = datetime(2024, 1, 10)

dates = []
while start <= end:
    dates.append(start)
    start += timedelta(days=1)

print(dates)


from datetime import datetime

d = datetime(2024, 6, 22)
first = d.replace(day=1)
print(first)   # 2024-06-01


from datetime import datetime, timedelta

d = datetime(2024, 2, 10)
next_month = d.replace(day=28) + timedelta(days=4)   # go past end
last_day = next_month - timedelta(days=next_month.day)
print(last_day)  # 2024-02-29


Generate hourly timestamps for January 1st, 2024.

import pandas as pd

rng = pd.date_range("2024-01-01", periods=24, freq="H")
print(rng)


from datetime import datetime

d = datetime(2024, 3, 10)
print(datetime(2024, 3, 5) <= d <= datetime(2024, 3, 20))


import pandas as pd

ts = pd.Timestamp("2024-01-10 14:25")
print(ts.round("H"))  # 14:00


import pandas as pd

print(pd.Timestamp("2024-06-15") + pd.DateOffset(months=1))


14. Find number of minutes between datetimes

from datetime import datetime

d1 = datetime(2024, 1, 1, 10, 0)
d2 = datetime(2024, 1, 1, 12, 30)

mins = (d2 - d1).total_seconds() / 60
print(mins)  # 150


from datetime import datetime
import pytz

utc = pytz.utc.localize(datetime(2024, 1, 1, 12))
ist = utc.astimezone(pytz.timezone("Asia/Kolkata"))
print(ist)


Find number of Saturdays + Sundays in March 2024.

import pandas as pd

rng = pd.date_range("2024-03-01", "2024-03-31", freq="D")
weekends = rng[rng.weekday >= 5]
print(len(weekends))