Time in IRST and IDLW
The time difference between Iran Standard Time (IRST) and International Date Line West Time (IDLW) is 15 hours 30 minutes. International Date Line West Time is 15 hours 30 minutes behind Iran Standard Time.
This means 9am IRST is 5:30pm IDLW (previous day) and 5pm IRST is 1:30am IDLW.
Iran Standard Time
- The current local time in IRST is 2:14 am (July 19, 2026)
- IRST time zone offset is UTC+03:30
International Date Line West Time
- The current local time in IDLW is 10:44 am (July 19, 2026)
- IDLW time zone offset is UTC-12:00
How to convert Iran Standard Time to International Date Line West Time?
Subtract 15 hours 30 minutes from Iran Standard Time to get International Date Line West Time.
Time in IRST
00:00
Time in IDLW
00:00
Use the slider above to convert Iran Standard Time to International Date Line West Time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| IRST | IDLW |
|---|---|
| 12am | 8:30am |
| 1am | 9:30am |
| 2am | 10:30am |
| 3am | 11:30am |
| 4am | 12:30pm |
| 5am | 1:30pm |
| 6am | 2:30pm |
| 7am | 3:30pm |
| 8am | 4:30pm |
| 9am | 5:30pm |
| 10am | 6:30pm |
| 11am | 7:30pm |
| 12pm | 8:30pm |
| 1pm | 9:30pm |
| 2pm | 10:30pm |
| 3pm | 11:30pm |
| 4pm | 0:30am |
| 5pm | 1:30am |
| 6pm | 2:30am |
| 7pm | 3:30am |
| 8pm | 4:30am |
| 9pm | 5:30am |
| 10pm | 6:30am |
| 11pm | 7:30am |