What time was it 24 hours ago?
Yesterday, at this exact time. Live, in your local time zone.
Right now
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24 hours ago
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The short version
24 hours ago is yesterday at the same wall-clock time. Same minute, same second, day before. 24 hours = 1,440 minutes = 86,400 seconds.
That's the answer almost every day of the year. The exceptions come around the spring-forward and fall-back changes (in regions that observe daylight saving time), where the wall clock shifts by an hour and the "same time yesterday" rule breaks.
Day-over-day: where the 24-hour anchor matters
Analytics dashboards
Most product, ops, and marketing dashboards default to comparing "last 24 hours vs. previous 24 hours" or "today vs. yesterday at this hour." Anchoring to the same wall-clock minute lets you compare like-for-like: what was traffic doing exactly 24 hours ago when the same daily pattern applied?
Fitness and sleep tracking
Sleep, heart-rate, and activity apps compare today's readings to the same time yesterday. A spike in resting heart rate vs. yesterday's baseline is more interesting than a spike vs. a 30-day average.
Weather observations
"Same time yesterday it was 12°C cooler" is a more honest comparison than morning-vs-afternoon temperature. Hourly observations 24 hours apart control for the daily temperature cycle.
Medication and dosing
Once-daily medications are often prescribed "at the same time each day." If you missed a dose, "what time was it 24 hours ago" tells you when the previous dose was due. Always confirm with your prescriber for catch-up dosing, since guidance varies by drug.
Where 24-hour math gets tricky
Spring forward
On the spring DST transition, the day is only 23 hours long (in the US the clock jumps from 2:00 AM to 3:00 AM). Counting back 24 hours from a time after the change lands 1 hour earlier on the clock than the same minute yesterday: 24 hours before 10:00 AM Sunday is 9:00 AM Saturday. A daily 7:00 AM reminder fires at the "same" clock time that morning, but only 23 elapsed hours after the one before.
Fall back
In the autumn, the clock repeats an hour (in the US, 1:00 to 2:00 AM happens twice), so the day is 25 hours long. Counting back 24 hours from a time after the change lands 1 hour later on the clock than the same minute yesterday: 24 hours before 10:00 AM Sunday is 11:00 AM Saturday.
February 28 vs February 29
A leap day is an ordinary 24-hour day, so it doesn't affect 24-hour math. But if you're comparing "this day last year," February 29 doesn't exist three years out of four.
Time-zone changes
If you crossed a time-zone boundary in the past 24 hours, your local clock doesn't reflect a continuous 24-hour interval. Use UTC or your origin zone if precision matters.
24 hours in other units
1
day
1,440
minutes
86,400
seconds
1/7
of a week
Frequently asked questions
Is 24 hours ago always yesterday at the same time?
Almost always. The exceptions come around the daylight saving changes, in regions that observe them: counting back 24 hours across a change lands one hour off the same clock time yesterday, because the change day itself lasts 23 or 25 hours.
How many minutes is 24 hours?
24 hours equals 1,440 minutes or 86,400 seconds, one full civil day.
Is 24 hours always exactly one day?
A civil (calendar) day is defined as 24 hours, or 86,400 SI seconds. The exceptions are the daylight saving change days in local time, which last 23 or 25 hours, and the rare day when UTC inserts a leap second because Earth's rotation drifts slightly.
What day was it 24 hours ago?
Almost always the previous calendar day in your local time zone, at the same time. If today is Wednesday, 24 hours ago was Tuesday. The live display at the top of this page shows the actual date.
Why does the time on this page update every second?
"24 hours ago" is defined relative to right now. Every second that passes, the answer moves forward by a second too.