Python time tzset() Method

Description

Python time tzset() reinitializes time-related settings based on the environment variable TZ.

Standard TZ environment variable format:

std offset [dst [offset [,start[/time], end[/time]]]]

Parameters

  • std and dst:Three or more abbreviation letters for time. Passed to time.tzname.
  • offset:Offset from UTC, format: [+|-]hh[:mm[:ss]] {h=0-23, m/s=0-59}.
  • start[/time], end[/time]:Date when DST starts taking effect. The format is m.w.d — representing the month, week number, and day of the date. w=1 refers to the first week of the month, while w=5 refers to the last week of the month. 'start' and 'end' can be one of the following formats:
    • Jn:Julian day n (1 <= n <= 365). Leap year days (February 29) are not counted.
    • n:Julian day (0 <= n <= 365). Leap year days (February 29) are counted.
    • Mm.n.d:The month, week number, and day of the date. w=1 refers to the first week of the month, while w=5 refers to the last week of the month.
    • time:(Optional) The time when DST starts taking effect (24-hour clock). Default value is 02:00 (local time in the specified time zone).

Syntax

time.tzset()

Parameters

  • NA。

Return Value

This function has no return value.

Example

The following example demonstrates how to use the tzset() function:

#!/usr/bin/python
import time
import os

os.environ['TZ'] = 'EST+05EDT,M4.1.0,M10.5.0'
time.tzset()
print time.strftime('%X %x %Z')

os.environ['TZ'] = 'AEST-10AEDT-11,M10.5.0,M3.5.0'
time.tzset()
print time.strftime('%X %x %Z')

The above example produces the following output:

13:00:40 02/17/09 EST
05:00:40 02/18/09 AEDT
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