Time Zone History

Manaus time zone history

Daylight saving time was used in 6 years since 1970, last in 1994; under the current rules the clocks no longer change. On standard time, clocks in Manaus run 4 seconds ahead of local mean solar time.

UTC−4

Standard time is UTC−4 all year under the current rules.

Covers: East Amazonas · tz database name America/Manaus

Convert a time from Manaus

Summer time in 6 of 57 years since 1970

UTC−4:00:04: 4 seconds behind today’s standard timeUTC−4: today’s standard timeUTC−3: 1 hour ahead of today’s standard timeUTC−4:00:04: 4 seconds behindtoday’s standard timeUTC−4: today’s standard timeUTC−3: 1 hour ahead of today’sstandard time

How to read this chart

Before 1970

19101920193019401950196019701910192019301940195019601970
JanFebMarAprMayJunJulAugSepOctNovDec1970198019902000201020202028JFMAMJJASOND1970198019902000201020202028

Standard time changes

DateChangeNew standard timeClock label
Before 1970
January 1, 1914Local mean time (UTC−4:00:04) replacedUTC−4numeric only

Daylight saving periods

YearsClocks go forwardClocks go backShift and labels
Before 1970
1931October 3not that year1 hour
1932October 3April 11 hour
1933not that yearApril 11 hour
1949December 1not that year1 hour
1950December 1April 161 hour
1951–19521 December, 00:001 April, 00:001 hour
1953not that yearMarch 11 hour
1963December 9not that year1 hour
1964not that yearMarch 11 hour
1965January 31, December 1April 11 hour
1966–19671 November, 00:001 March, 01:001 hour
1968not that yearMarch 11 hour
Since 1970
1985November 2not that year1 hour
1986October 25March 151 hour
1987October 25February 141 hour
1988not that yearFebruary 71 hour
1993October 17not that year1 hour
1994not that yearFebruary 201 hour

Also on UTC−4

Boa Vista (Brazil), Porto Velho (Brazil), Guyana, Cuiabá (Brazil), Venezuela, Bolivia, Barbados, Martinique, Campo Grande (Brazil) and Puerto Rico (nearest first; 8 more on the list of offsets).

Clocks next door since 1970

  • Santarém (577 km): same time except 6,891 days in 1993, 1994 and 2008–2026; 1 hour ahead today.
  • Boa Vista (666 km): same time except 280 days in 1993, 1994, 1999 and 2000.
  • Porto Velho (759 km): same time except 126 days in 1993 and 1994.
  • Guyana (1,123 km): same time except 7,899 days in 1970–1994.
  • Suriname (1,133 km): usually 1 hour ahead; different on 5,863 days in 1970–1988, 1993 and 1994.

How it compares

Standard time has stayed at UTC−4 since 1914.