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Convert Iran Time to Mountain Time

IRST · UTC+3:30 → MST · UTC−6

IRST is 9 hours 30 minutes ahead of MST

Tehran · UTC+3:30

Tuesday, 8 September 2026

Denver · MDT

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
TehranUTC+3:30 · +03:30
0003060912151821
DenverMDT · -06:00
1417202302050811

No overlap in standard working hours. Closest workable window: 18:30–23:00 in Tehran, which is 09:00–13:30 in Denver.

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

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10:36 Tue 8 Sep Tehran = 01:06 Tue 8 Sep Denver

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Hour-by-hour conversion

Tehran (IRST)Denver (MST)
00:0014:30prev. day
01:0015:30prev. day
02:0016:30prev. day
03:0017:30prev. day
04:0018:30prev. day
05:0019:30prev. day
06:0020:30prev. day
07:0021:30prev. day
08:0022:30prev. day
09:0023:30prev. day
10:0000:30Now
11:0001:30
12:0002:30
13:0003:30
14:0004:30
15:0005:30
16:0006:30
17:0007:30
18:0008:30
19:0009:30
20:0010:30
21:0011:30
22:0012:30
23:0013:30

About this conversion

IRST here means Iran Time, represented by Tehran (Asia/Tehran), currently UTC+3:30. 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 Tehran; day boundaries are marked where the date differs.

Quick answers

  • 09:00 IRST is 23:30 MST
  • 12:00 IRST is 02:30 MST
  • 15:00 IRST is 05:30 MST
  • 18:00 IRST is 08:30 MST

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