Timezones.in — Stay In Sync

Convert Japan Time to Mountain Time

JST · UTC+9 → MST · UTC−6

JST is 15 hours ahead of MST

Tokyo · UTC+9

Tuesday, 8 September 2026

Denver · MDT

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
TokyoUTC+9 · +09:00
0003060912151821
DenverMDT · -06:00
0912151821000306

No overlap in standard working hours. Closest workable window: 07:00–14:00 in Tokyo, which is 16:00–23:00 in Denver.

Working (09–18) Awake, off the clock Asleep (23–07)

Pick a time and share it

16:06 Tue 8 Sep Tokyo = 01:06 Tue 8 Sep Denver

Open in planner

Post this

XLinkedInWhatsAppFacebookTelegramEmail

Hour-by-hour conversion

Tokyo (JST)Denver (MST)
00:0009:00prev. day
01:0010:00prev. day
02:0011:00prev. day
03:0012:00prev. day
04:0013:00prev. day
05:0014:00prev. day
06:0015:00prev. day
07:0016:00prev. day
08:0017:00prev. day
09:0018:00prev. day
10:0019:00prev. day
11:0020:00prev. day
12:0021:00prev. day
13:0022:00prev. day
14:0023:00prev. day
15:0000:00
16:0001:00Now
17:0002:00
18:0003:00
19:0004:00
20:0005:00
21:0006:00
22:0007:00
23:0008:00

About this conversion

JST here means Japan Time, represented by Tokyo (Asia/Tokyo), currently UTC+9. MST means Mountain Time, represented by Denver (America/Denver), currently UTC−6.

MST is used by 4 zones, including United States. See every meaning of MST.

Working hours are shown as 09:00–18:00 local, and sleeping hours as 23:00–07:00. The hour table is anchored on the current day in Tokyo; day boundaries are marked where the date differs.

Quick answers

  • 09:00 JST is 18:00 MST
  • 12:00 JST is 21:00 MST
  • 15:00 JST is 00:00 MST
  • 18:00 JST is 03:00 MST

Related conversions