tzdata rule group

Nic

Historical rule context · 1 represented zone

A rule group describes recurring clock changes. It is not itself a place or an IANA time-zone identifier.

First rule
1979
Last rule
2006
Rule entries
6
Source files
northamerica

Notes from the time database

Context for this rule

These source notes are preserved from tzdata. They help explain a rule’s period, without adding claims beyond the source.

1998–2006

Rule context

Nicaragua This uses Shanks & Pottenger for times before 2005. I've got reports from 8 different people that Nicaragua just started DST on Sunday 2005-04-10, in order to save energy because of expensive petroleum. The exact end date for DST is not yet announced, only "September" but some sites also say "mid-September". Some background information is available on the President's official site: The Decree, no 23-2005 is available here: The decree doesn't say anything about daylight saving, but for now let's assume that it is daylight saving.... The Associated Press story on the time change, which can be found at The tzdata source notes: "The last time that a change of clocks was applied to save energy was in the year 2000 during the Arnoldo Alemán administration."... The northamerica file says that Nicaragua has been on UTC-6 continuously since December 1998. I wasn't able to find any details of Nicaraguan time changes in 2000. Perhaps a note could be added to the northamerica file, to the effect that we have indirect evidence that DST was observed in 2000. From Jesper Nørgaard Welen (2005-11-02): Nicaragua left DST the 2005-10-02 at 00:00 (local time). (2005-09-26) From Jesper Nørgaard Welen (2006-05-05): (my informal translation) By order of the president of the republic, Enrique Bolaños, Nicaragua advanced by sixty minutes their official time, yesterday at 2 in the morning, and will stay that way until 30th of September. From Jesper Nørgaard Welen (2006-09-30): My informal translation runs: The natural sun time is restored in all the national territory, in that the time is returned one hour at 01:00 am of October 1 of 2006.

Original rule fields

Recorded rule entries

Structured directly from tzdata’s Rule lines.

FromToTypeInOnAtSave
19791980-MarSun>=160:001:00
19791980-JunMon>=230:000
2005only-Apr100:001:00
2005only-OctSun>=10:000
2006only-Apr302:001:00
2006only-OctSun>=11:000