Time Change: When? Why?

When Is the Next Time Change?

When is the next time change falling into or out of Daylight Saving Time?
••• When does the time change? Why does the time change?. Jeff J. Mitchell / Getty Images

When Is the Next Time Change?

Scroll down the page to find out when you need to spring forward or fall back, a time change that happens twice a year in Montreal, as well as in most of the province of Quebec* and in many parts of the world.

Why the Time Change?

Daylight Saving Time allegedly helps reduce energy consumption, hence its official raison d'être.

Spring Time Change: Start of Daylight Saving Time

The second Sunday of March is when residents must spring forward, setting clocks one hour ahead, usually before bedtime on the Saturday preceding the Sunday.

The time changes to Daylight Saving Time at exactly 2 a.m. Sunday morning, which means 2 a.m. becomes 3 a.m. on these dates:

  • Sunday, March 11, 2018
  • Sunday, March 10, 2019
  • Sunday, March 8, 2020
  • Sunday, March 14, 2021
  • Sunday, March 13, 2022
  • Sunday, March 12, 2023
  • Sunday, March 10, 2024
  • Sunday, March  9, 2025

Fall Time Change: End of Daylight Saving Time

The first Sunday of November is when residents must fall back to Standard Time, setting clocks one hour behind, again, before bedtime on the Saturday preceding the Sunday. The time shifts to Standard Time at exactly 2 a.m. Sunday morning, which means 2 a.m. becomes 1 a.m. on these dates:

  • Sunday, November 4, 2018
  • Sunday, November 3, 2019
  • Sunday, November 1, 2020
  • Sunday, November 7, 2021
  • Sunday, November 6, 2022
  • Sunday, November 5, 2023
  • Sunday, November 3, 2024
  • Sunday, November 2, 2025

*Far east Quebec regions Basse-Côte-Nord and Îles de la Madeleine do not shift to Daylight Saving Time, remaining in Atlantic Standard Time year round.

Note that most of the province of Quebec is in the Eastern Standard Time zone (UTC – 5 hours) and when in DST, in the Eastern Daylight Saving Time zone (UTC – 4 hours). For a detailed account of time zones in Quebec, consult the Legal Time Act.

I Feel Awful After the Time Change? Why?

Shifting the time by as little as one hour can upset the body's natural rhythm.

 

Is the Time Change Dangerous?

It depends what time change you're talking about. Apparently, gaining an extra hour of sleep by falling back into Standard Time in the fall is good for the heart.

But losing one hour in the spring is another story.

Considering the U.S. Centers for Disease Control claimed in 2016 that more than one third of Americans are getting less than 7 hours of sleep a night, in concert with the National Sleep Foundation's 2014 finding that 45% of Americans say "that poor or insufficient sleep affected their daily activities at least once in the past seven days,"  could a case be made that Daylight Saving Time is "dangerous?"

Among other concerns, including the Canadian Centre for Occupational Health and Safety's report that collisions in British Columbia "on the first Monday after the spring time change increased by 23 per cent from 2005-2009, " Business Insider cited a 2008 study where the suicide rate in Australian men was shown to increase in the weeks following the onset of Daylight Saving Time, when clocks are set forward one hour. But one caveat. Because this is correlational research, it's hardly conclusive. There's no proof the time change is the reason collisions or suicide rates went up.

All we know for certain is they happened around the same time. In other words, just because B happened after A occurred doesn't mean A caused B to happen, the inherent problem with a significant chunk of the research cited in relation to the time change.

Dangerous Or Not, I'm Miserable for Weeks After the Time Change. Why?

The time change is believed to disrupt circadian rhythms, the body's natural sleep-wake cycle. It's also been suggested that it's more disruptive than comparable jet lag.

What Can I Do to Adjust to the Time Change More Easily?

There are a few things you can do to dampen the effects of the time change on your body's natural rhythm:

  • go to bed 10 to 15 minutes earlier a few nights before the time change and wake up 10 to 15 minutes earlier for a gradual ease into Daylight Saving Time, even a two-day head start is better than nothing
  • don't take a nap the Saturday afternoon before the Sunday time change, it will only exacerbate the problem
  • get some sun first thing Sunday and Monday morning to help reset your body's internal clock
  • avoid evening light the Sunday of the time change as well as the Monday after to further strengthen the reset