2024 time change dates for Brazil
Brazil does not observe Daylight Saving Time
Brazil abolished Daylight Saving Time in April 2019. Clocks have not changed since, and the whole country stays on standard time year-round.
Brazil stays on BRT for the whole year.
Countdown to the next change
Technology and Time Changes in 2024
Phones, computers and anything else that syncs with an internet time server handle the transition on their own. What still catches people out in Brazil is the long tail of devices that don't: car dashboards, ovens and microwaves, wall clocks, older thermostats, and cheap alarm clocks with a DST setting hard-coded to a schedule that has since changed.
For anyone running servers, the transitions are a recurring source of bugs — duplicated or missing local timestamps around the changeover, cron jobs that fire twice or not at all, and stale operating system timezone databases. Storing timestamps in UTC and keeping the tzdata package current avoids almost all of it.
Background
- The spring transition is associated with a measurable short-term rise in heart attacks and fatal traffic crashes, an effect researchers attribute to the lost hour of sleep rather than the clock itself.
- The energy case for DST is weak by modern standards. A US Department of Energy study in 2008 found savings of about 0.5% of daily electricity use, and other studies have found no saving at all.
- Russia experimented with permanent summer time from 2011 to 2014 before settling on permanent standard time.
Tips for Brazil
Use the extra evening daylight in summer for outdoor activities and vitamin D.
Remember that not all countries change on the same date - check international meeting times carefully.
Consider the time change when scheduling meetings with people in other time zones.
Take advantage of the 'extra' hour in fall to catch up on sleep or tackle a project.
Frequently asked questions
When do the clocks change in Brazil in 2024?
They do not. Brazil does not observe Daylight Saving Time.
Which way do the clocks go?
"Spring forward, fall back" is the usual mnemonic: forward one hour in spring, back one hour in autumn.
Do I have to change anything myself?
Phones, computers and anything that syncs over the internet update on their own. Car clocks, ovens, microwaves and older wall clocks generally do not.
Is Daylight Saving Time being scrapped?
It has been proposed in many places and adopted in few. The European Parliament voted in 2019 to end mandatory clock changes and the change has stalled; in the United States the Sunshine Protection Act has repeatedly passed the Senate without becoming law. Most of the world that changes its clocks is still changing them.