Time in IDLW and MST
The time difference between International Date Line West Time (IDLW) and Mountain Standard Time (MST) is 5 hours. Mountain Standard Time is 5 hours ahead of International Date Line West Time.
This means 9am IDLW is 2pm MST and 5pm IDLW is 10pm MST.
International Date Line West Time
- The current local time in IDLW is 12:36 am (July 19, 2026)
- IDLW time zone offset is UTC-12:00
Mountain Standard Time
- The current local time in MST is 7:36 pm (July 18, 2026)
- MST time zone offset is UTC-07:00
How to convert International Date Line West Time to Mountain Standard Time?
Add 5 hours to International Date Line West Time to get Mountain Standard Time.
Time in IDLW
00:00
Time in MST
00:00
Use the slider above to convert International Date Line West Time to Mountain Standard 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
| IDLW | MST |
|---|---|
| 12am | 5am |
| 1am | 6am |
| 2am | 7am |
| 3am | 8am |
| 4am | 9am |
| 5am | 10am |
| 6am | 11am |
| 7am | 12pm |
| 8am | 1pm |
| 9am | 2pm |
| 10am | 3pm |
| 11am | 4pm |
| 12pm | 5pm |
| 1pm | 6pm |
| 2pm | 7pm |
| 3pm | 8pm |
| 4pm | 9pm |
| 5pm | 10pm |
| 6pm | 11pm |
| 7pm | 12am |
| 8pm | 1am |
| 9pm | 2am |
| 10pm | 3am |
| 11pm | 4am |