The countdown above uses your device’s clock, so it is correct wherever you are. It shows both 1:30s because “1:30” happens twice a day:
- 1:30 AM is 1 hour 30 minutes after midnight (01:30 on a 24-hour clock).
- 1:30 PM is 1 hour 30 minutes after noon (13:30 on a 24-hour clock).
Which one is next?
- Between 1:30 AM and 1:30 PM, the next 1:30 is 1:30 PM today.
- Between 1:30 PM and 1:30 AM, the next 1:30 is 1:30 AM. If it is still before midnight, that 1:30 AM falls on tomorrow’s date.
So the next 1:30 of either kind is never more than 12 hours away. If you need one specific 1:30, such as 1:30 PM tomorrow, the wait can be up to 24 hours.
Quick lookup: time left from each hour
Find the current hour, then subtract the minutes already past the hour (see the shortcut below the table).
| If it’s now… | Until next 1:30 AM | Until next 1:30 PM |
| 12:00 AM (midnight) | 1 h 30 m | 13 h 30 m |
| 1:00 AM | 0 h 30 m | 12 h 30 m |
| 2:00 AM | 23 h 30 m | 11 h 30 m |
| 3:00 AM | 22 h 30 m | 10 h 30 m |
| 4:00 AM | 21 h 30 m | 9 h 30 m |
| 5:00 AM | 20 h 30 m | 8 h 30 m |
| 6:00 AM | 19 h 30 m | 7 h 30 m |
| 7:00 AM | 18 h 30 m | 6 h 30 m |
| 8:00 AM | 17 h 30 m | 5 h 30 m |
| 9:00 AM | 16 h 30 m | 4 h 30 m |
| 10:00 AM | 15 h 30 m | 3 h 30 m |
| 11:00 AM | 14 h 30 m | 2 h 30 m |
| 12:00 PM (noon) | 13 h 30 m | 1 h 30 m |
| 1:00 PM | 12 h 30 m | 0 h 30 m |
| 2:00 PM | 11 h 30 m | 23 h 30 m |
| 3:00 PM | 10 h 30 m | 22 h 30 m |
| 4:00 PM | 9 h 30 m | 21 h 30 m |
| 5:00 PM | 8 h 30 m | 20 h 30 m |
| 6:00 PM | 7 h 30 m | 19 h 30 m |
| 7:00 PM | 6 h 30 m | 18 h 30 m |
| 8:00 PM | 5 h 30 m | 17 h 30 m |
| 9:00 PM | 4 h 30 m | 16 h 30 m |
| 10:00 PM | 3 h 30 m | 15 h 30 m |
| 11:00 PM | 2 h 30 m | 14 h 30 m |
Times for the next day assume no clock change happens in between. The daylight-saving section below explains the exception.
Using the table at a time that isn’t on the hour: Look up the hour, then subtract the minutes already passed. At 9:47 AM, the 9:00 AM row gives 4 h 30 m until 1:30 PM. Subtract 47 minutes to get 3 hours 43 minutes.
Working it out yourself
The easiest way is to count in two steps: up to the next full hour, then from there to 1:30.
Example: it’s 9:47 AM. How long until 1:30 PM?
- 9:47 → 10:00 is 13 minutes.
- 10:00 AM → 1:30 PM is 3 hours 30 minutes.
- Total: 3 hours 43 minutes.
Example: it’s 10:15 PM. How long until 1:30 AM?
- 10:15 → 11:00 PM is 45 minutes.
- 11:00 PM → 1:30 AM is 2 hours 30 minutes.
- Total: 3 hours 15 minutes.
A shortcut for the minutes. Because the target is on the half hour, the minutes part of the answer follows a simple rule:
- If the current minutes are less than 30, minutes left = 30 − current minutes.
- If they are 30 or more, minutes left = 90 − current minutes, and the hours part is one less than the table shows for that hour.
At 9:47, minutes left = 90 − 47 = 43. That matches the 3 h 43 m above.
Subtracting on a 24-hour clock. Write 1:30 PM as 13:30. For 13:30 − 9:47, you can’t take 47 from 30, so borrow an hour: 13:30 becomes 12:90. Then 12:90 − 9:47 = 3:43.
If the target is 1:30 AM and it is currently the evening, add 24 hours to the target first. For example, from 22:15, count to 25:30, which gives 3:15.
Read also: How Much Time Until 2:30?
Converting to total minutes or seconds
Some people need the answer in minutes, for a timer or a cooking or work calculation.
- Total minutes = hours × 60 + minutes.
3 h 43 m = 180 + 43 = 223 minutes. - Total seconds = total minutes × 60.
223 minutes = 13,380 seconds.
As a general formula on a 24-hour clock, with times converted to minutes after midnight:
- 1:30 AM = 90 minutes after midnight
- 1:30 PM = 810 minutes after midnight
- Minutes left = target − now. If the result is zero or negative, add 1,440 (the minutes in a day) for the next occurrence.
At 9:47 AM, it is 587 minutes after midnight, so 810 − 587 = 223 minutes. ✓
If it’s 1:31 PM, you just missed it
Right after 1:30 passes, the countdown jumps to the other 1:30, not back to zero.
- At 1:45 PM, the next 1:30 AM is 11 h 45 m away, and the next 1:30 PM is 23 h 45 m away.
- At exactly 1:30, the remaining time is zero. The other 1:30 is 12 hours away.
“1:30 tonight” is technically tomorrow
When someone says “the stream starts at 1:30 tonight” or “my flight is at 1:30 in the morning,” they almost always mean 1:30 AM. That time comes after midnight, so it falls on the next calendar date.
This matters when booking. A 1:30 AM departure “on Friday night” is listed as Saturday, 01:30 on a ticket or calendar. If you enter it as Friday 1:30 AM, you’ll be a full day early or, worse, a day late. When in doubt, check the 24-hour time. 01:30 and 13:30 can never be confused.
Why 1:30 AM is the odd one out during clock changes
Daylight-saving changes happen in the early morning, and 1:30 AM sits right inside the affected hour in both the US and the UK.
United States. Clocks go ahead one hour at 2:00 a.m. on the second Sunday in March, and on the first Sunday in November they go back one hour at 2:00 a.m., which becomes 1:00 a.m. standard time. So on the November change night, the hour from 1:00 to 2:00 a.m. happens twice. That means 1:30 AM happens twice:
- From midnight that night, the first 1:30 AM is 1 hour 30 minutes away.
- The second 1:30 AM, after clocks fall back, is 2 hours 30 minutes away.
If you’ve set something for “1:30 AM” that night, it is worth knowing which one you mean.
United Kingdom. UK clocks go forward one hour at 1am on the last Sunday in March and back one hour at 2am on the last Sunday in October. That has two effects:
- In March, the clock goes straight from 12:59 AM to 2:00 AM. 1:30 AM does not exist on that day.
- In October, the clock goes from 1:59 AM back to 1:00 AM, so 1:30 AM happens twice.
Countdowns that cross a clock change. Even a countdown to 1:30 PM is off by an hour if the change happens before it arrives. From 10:00 PM Saturday to 1:30 PM Sunday, the clock face suggests 15 h 30 m. In real time, it is 14 h 30 m on the spring-forward night and 16 h 30 m on the fall-back night.
Upcoming dates when this applies:
Many places don’t change their clocks at all, so this doesn’t apply there. A countdown that uses your device’s clock handles your local rules automatically.
When the 1:30 is in someone else’s time zone
If the 1:30 belongs to another place, such as a 1:30 PM Eastern webinar or a 1:30 AM London kickoff, convert it to your own time first, then count down.
For example, in winter, 1:30 PM Eastern Standard Time (UTC−5) is 6:30 PM in London (GMT, UTC+0). Count down to 6:30 PM, not to 1:30 PM. Counting down to the other place’s clock time is the most common way to get a time-until answer wrong by several hours.
Read more about these:
- Thanks for Your Understanding vs Thank You for Understanding: Which Is Correct?
- Moving Forward vs Going Forward: What’s the Difference?
- Thanks for the Heads Up vs Thanks for a Heads Up: Which Is Correct?
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