Time Zone History

Bolivia time zone history

On standard time, clocks in La Paz run 33 minutes ahead of local mean solar time. Local mean time, UTC−4:32:36, ended in 1890.

UTC−4

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

tz database name America/La_Paz

Convert a time from Bolivia

UTC−4 every day since 1970

UTC−4:32:36: 33 minutes behind today’s standard timeUTC−4: today’s standard timeUTC−3:32:36: 27 minutes ahead of today’s standard timeUTC−4:32:36: 33 minutes behindtoday’s standard timeUTC−4: today’s standard timeUTC−3:32:36: 27 minutes ahead oftoday’s standard time

How to read this chart

Before 1970

18801900192019401960188019201960
JanFebMarAprMayJunJulAugSepOctNovDec1970198019902000201020202028JFMAMJJASOND1970198019902000201020202028

Standard time changes

DateChangeNew standard timeClock label
Before 1970
January 1, 1890Local mean time (UTC−4:32:36) replacedUTC−4:32:36CMT
March 21, 1932Standard time forward 33 minutesUTC−4numeric only

Daylight saving periods

YearsClocks go forwardClocks go backShift and labels
1931October 15not that year1 hour, CMT to BST

Also on UTC−4

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

Clocks next door since 1970

  • Rio Branco (Brazil) (727 km): usually 1 hour behind; different on 2,315 days in 1985–1988 and 2008–2013.
  • Jujuy (Argentina) (904 km): usually 1 hour ahead; different on 1,137 days in 1974, 1988–1993, 2007 and 2008.
  • Salta (Argentina) (964 km): usually 1 hour ahead; different on 1,046 days in 1974, 1988–1993, 2007 and 2008.
  • Porto Velho (Brazil) (976 km): same time except 350 days in 1985–1988.
  • Peru (1,079 km): usually 1 hour behind; different on 360 days in 1986, 1987, 1990 and 1994.

How it compares

Bolivia has kept UTC−4 since 1932, with no clock changes since 1970.