Time in SST and IDLW
The time difference between Singapore Standard Time (SST) and International Date Line West Time (IDLW) is 20 hours. International Date Line West Time is 20 hours behind Singapore Standard Time.
This means 9am SST is 1pm IDLW (previous day) and 5pm SST is 9pm IDLW (previous day).
Singapore Standard Time
- The current local time in SST is 3:08 pm (September 2, 2026)
- SST time zone offset is UTC+08:00
International Date Line West Time
- The current local time in IDLW is 7:08 pm (September 2, 2026)
- IDLW time zone offset is UTC-12:00
How to convert Singapore Standard Time to International Date Line West Time?
Subtract 20 hours from Singapore Standard Time to get International Date Line West Time.
Time in SST
00:00
Time in IDLW
00:00
Use the slider above to convert Singapore 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
| SST | IDLW |
|---|---|
| 12am | 4am |
| 1am | 5am |
| 2am | 6am |
| 3am | 7am |
| 4am | 8am |
| 5am | 9am |
| 6am | 10am |
| 7am | 11am |
| 8am | 12pm |
| 9am | 1pm |
| 10am | 2pm |
| 11am | 3pm |
| 12pm | 4pm |
| 1pm | 5pm |
| 2pm | 6pm |
| 3pm | 7pm |
| 4pm | 8pm |
| 5pm | 9pm |
| 6pm | 10pm |
| 7pm | 11pm |
| 8pm | 12am |
| 9pm | 1am |
| 10pm | 2am |
| 11pm | 3am |