Brian Snyder/Reuters
- Daylight-saving time in the US begins on Sunday, March 12, 2023 at 2 a.m.
- Phones and other devices will automatically tick forward one hour, and we'll lose an hour of sleep.
- Incidents of heart attacks, strokes, and fatal car crashes all spike around the start of DST.
Daylight-saving time is a killer.
The annual ritual in which we "gain" an hour of evening light in the summertime by pushing the clocks forward one hour each spring may seem like a harmless shift.