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Python: Set the default timezone used by all date/time functions

Python Datetime: Exercise-54 with Solution

Write a Python program to set the default timezone used by all date/time functions.

Sample Solution:

Python Code:

# Import the os and time modules
import os, time

# Print the current time in the default timezone before the timezone change
print(time.strftime('%Y-%m-%d %H:%M:%S')) # before timezone change

# Set the new timezone to 'America/Los_Angeles'
os.environ['TZ'] = 'America/Los_Angeles'

# Apply the timezone change
time.tzset()

# Print the current time in the new timezone after the timezone change
print(time.strftime('%Y-%m-%d %H:%M:%S')) # after timezone change

Output:

2020-07-21 13:09:47
2020-07-21 06:09:47

Explanation:

In the exercise above,

  • The code imports the "os" and "time" modules. time.
  • It prints the current time in the default timezone using "time.strftime('%Y-%m-%d %H:%M:%S')". This function formats the time according to the given format string, which represents the year, month, day, hour, minute, and second.
  • It sets the new timezone to 'America/Los_Angeles' by updating the 'TZ' environment variable in the "os.environ" dictionary.
  • It applies the timezone change using "time.tzset()", which refreshes the timezone settings.
  • It prints the current time in the new timezone after the timezone change using the same "time.strftime('%Y-%m-%d %H:%M:%S')" function.

Flowchart:

Flowchart: Set the default timezone used by all date/time functions.

Python Code Editor:

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Next: The epoch is the point where the time starts, and is platform dependent. For Unix, the epoch is January 1, 1970, 00:00:00 (UTC). Write a Python program to find out what the epoch is on a given platform. Also convert a given time in seconds since the epoch.

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