154. Handling Time Zones with pytz

Here are 10 Python snippets demonstrating how to handle time zones with the pytz library. Each snippet is separated by a delimiter.

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Snippet 1: Convert UTC Time to Local Time

from datetime import datetime
import pytz

utc_time = datetime.utcnow()
utc_zone = pytz.utc
local_zone = pytz.timezone('Asia/Kolkata')

utc_time_aware = utc_zone.localize(utc_time)
local_time = utc_time_aware.astimezone(local_zone)

print("UTC Time:", utc_time)
print("Local Time:", local_time)

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Snippet 2: Get Current Time in a Specific Time Zone

from datetime import datetime
import pytz

tz = pytz.timezone('America/New_York')
current_time = datetime.now(tz)

print("Current Time in New York:", current_time)

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Snippet 3: List All Available Time Zones

import pytz

time_zones = pytz.all_timezones
print("Available Time Zones:")
for tz in time_zones[:10]:  # Displaying only the first 10
    print(tz)

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Snippet 4: Convert Between Time Zones

from datetime import datetime
import pytz

tz_1 = pytz.timezone('Asia/Tokyo')
tz_2 = pytz.timezone('Europe/London')

tokyo_time = tz_1.localize(datetime(2025, 1, 23, 15, 0))
london_time = tokyo_time.astimezone(tz_2)

print("Tokyo Time:", tokyo_time)
print("London Time:", london_time)

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Snippet 5: Make a Naive Datetime Time Zone-Aware

from datetime import datetime
import pytz

naive_time = datetime(2025, 1, 23, 10, 0)
tz = pytz.timezone('Asia/Dubai')

aware_time = tz.localize(naive_time)
print("Naive Time:", naive_time)
print("Aware Time:", aware_time)

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Snippet 6: Handling Daylight Saving Time (DST)

from datetime import datetime
import pytz

tz = pytz.timezone('America/New_York')

# Before DST
dt_before = tz.localize(datetime(2025, 3, 1, 12, 0))
print("Before DST:", dt_before)

# After DST
dt_after = tz.localize(datetime(2025, 11, 1, 12, 0))
print("After DST:", dt_after)

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Snippet 7: Calculate Time Difference Between Two Time Zones

from datetime import datetime
import pytz

tz_1 = pytz.timezone('Australia/Sydney')
tz_2 = pytz.timezone('Europe/Paris')

now_sydney = datetime.now(tz_1)
now_paris = datetime.now(tz_2)

time_diff = now_sydney - now_paris
print("Time Difference:", time_diff)

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Snippet 8: Convert String to Time Zone-Aware Datetime

from datetime import datetime
import pytz

time_string = "2025-01-23 15:30:00"
tz = pytz.timezone('Asia/Singapore')

naive_time = datetime.strptime(time_string, "%Y-%m-%d %H:%M:%S")
aware_time = tz.localize(naive_time)

print("Aware Time:", aware_time)

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Snippet 9: Get UTC Offset of a Time Zone

from datetime import datetime
import pytz

tz = pytz.timezone('Europe/Berlin')
current_time = datetime.now(tz)

utc_offset = current_time.utcoffset()
print("UTC Offset:", utc_offset)

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Snippet 10: Find Current Time in Multiple Time Zones

from datetime import datetime
import pytz

time_zones = ['Asia/Kolkata', 'America/New_York', 'Europe/London', 'Australia/Sydney']

for zone in time_zones:
    tz = pytz.timezone(zone)
    current_time = datetime.now(tz)
    print(f"Current Time in {zone}: {current_time}")

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