Africa/Blantyre

Time zone identifier: Africa/Blantyre

Current civil offset: +02:00 (CAT)

Current DST state: Observing Standard Time

First standard time adoption: Adopted on 1911-07-23

Local Mean Time (LMT): +02:20 based on geographic meridian

Total recorded transitions: 3 transitions across 4 distinct offsets

Associated countries: MW

Historical Offset Step Chart (1880 to Present)

Text summary: Africa/Blantyre shifted between 4 distinct offsets from 1911-07-23 through the modern era.

Complete Transition History (3 Transitions)

UTC Instant	Local Wall Time	Shift	Abbreviation	DST	Effect
`1911-07-23T21:40:00Z`	`1911-07-24 00:01:10`	+02:20 → +02:21:10	`ZMT`	No	gap
`1914-06-29T21:38:50Z`	`1914-06-29 23:59:50`	+02:21:10 → +02:21	`ZMT`	No	overlap
`1925-06-30T21:39:00Z`	`1925-06-30 23:39:00`	+02:21 → +02:00	`CAT`	No	overlap

Notes from the Maintainers

Source: backzone (Lines 213 to 225)

Malawi
From P Chan (2020-12-09):
In 1911, Zomba mean time was adopted as the legal time of Nyasaland.  In
1914, Zomba mean time switched from GMT+2:21:10 to GMT+2:21. On 1925-07-01,
GMT+2 was adopted.

Interpretation and General Clauses Ordinance, 1911 (No. 12 of 1911)
[1911-07-24]
Notice No. 124 of 1914, 1914-06-30, The Nyasaland Government Gazette, Vol.
XXI, No. 8, 1914-06-30, p 122
Interpretation and General Clauses (Amendment) Ordinance, 1925 (No. 3 of
1925) [1925-04-02]

Attributed Statements:

P Chan (2020-12-09):

In 1911, Zomba mean time was adopted as the legal time of Nyasaland. In 1914, Zomba mean time switched from GMT+2:21:10 to GMT+2:21. On 1925-07-01, GMT+2 was adopted. Interpretation and General Clauses Ordinance, 1911 (No. 12 of 1911) [1911-07-24] Notice No. 124 of 1914, 1914-06-30, The Nyasaland Government Gazette, Vol. XXI, No. 8, 1914-06-30, p 122 Interpretation and General Clauses (Amendment) Ordinance, 1925 (No. 3 of 1925) [1925-04-02]

Years on Record

Methodology Note: The 1970 Rule

tzdb guarantees accuracy for timestamps from 1970 onwards. Transitions prior to 1970 represent best-effort historical reconstructions.