Convert MSK to ACST
ACST is 6 hours 30 minutes ahead of MSK. MSK is UTC+3 and ACST is UTC+9:30.
Right now: MSK · ACST
Best time to schedule a meeting
Standard 9–5 working hours overlap for 2 hours: 9:00 AM–11:00 AM MSK (3:00 PM–5:00 PM ACST). Schedule meetings inside that window.
| MSK | ACST | Suitable? |
|---|---|---|
| 9:00 AM | 3:30 PM | working hours |
| 10:00 AM | 4:30 PM | working hours |
| 11:00 AM | 5:30 PM | outside 9–5 |
| 12:00 PM | 6:30 PM | outside 9–5 |
| 1:00 PM | 7:30 PM | outside 9–5 |
| 2:00 PM | 8:30 PM | outside 9–5 |
| 3:00 PM | 9:30 PM | outside 9–5 |
| 4:00 PM | 10:30 PM | outside 9–5 |
| 5:00 PM | 11:30 PM | outside 9–5 |
MSK to ACST conversion table
| MSK | ACST |
|---|---|
| 12:00 AM | 6:30 AM |
| 1:00 AM | 7:30 AM |
| 2:00 AM | 8:30 AM |
| 3:00 AM | 9:30 AM |
| 4:00 AM | 10:30 AM |
| 5:00 AM | 11:30 AM |
| 6:00 AM | 12:30 PM |
| 7:00 AM | 1:30 PM |
| 8:00 AM | 2:30 PM |
| 9:00 AM | 3:30 PM |
| 10:00 AM | 4:30 PM |
| 11:00 AM | 5:30 PM |
| 12:00 PM | 6:30 PM |
| 1:00 PM | 7:30 PM |
| 2:00 PM | 8:30 PM |
| 3:00 PM | 9:30 PM |
| 4:00 PM | 10:30 PM |
| 5:00 PM | 11:30 PM |
| 6:00 PM | 12:30 AM (next day) |
| 7:00 PM | 1:30 AM (next day) |
| 8:00 PM | 2:30 AM (next day) |
| 9:00 PM | 3:30 AM (next day) |
| 10:00 PM | 4:30 AM (next day) |
| 11:00 PM | 5:30 AM (next day) |
About MSK
Moscow Time (MSK) is UTC+3. It is used in Moscow and western Russia, with no daylight saving.
Moscow Time is UTC+3 and is fixed year-round: Russia abolished daylight saving in 2014 after a brief and unpopular experiment with permanent summer time. That makes Moscow's relationship with Europe seasonal from Europe's side only — the gap to Berlin is two hours in winter and one in summer, and nothing in Moscow moves to cause it.
About ACST
Australian Central Standard Time (ACST) is UTC+9:30. It is used in Adelaide and Darwin in winter.
Australian Central Standard Time is UTC+9:30, half an hour behind the eastern states rather than a whole hour, which surprises people every time. South Australia moves to daylight saving in October and the Northern Territory does not, so Adelaide and Darwin share this offset for half the year and are an hour apart for the other half.
Does this gap change with the seasons?
Neither MSK nor ACST shifts with the seasons, so this 6.5-hour difference holds all year. That is unusual enough to be worth relying on: most cross-continental gaps move twice a year.
This is the reason scheduling systems store an IANA zone such as Region/City rather than an offset or an abbreviation: the zone knows its own rules and the offset does not.
Frequently asked questions
What time is 9:00 AM MSK in ACST?
9:00 AM MSK is 3:30 PM ACST.
Is ACST ahead of MSK?
ACST is 6 hours 30 minutes ahead of MSK.
Which time zone does this use?
MSK is UTC+3 and ACST is UTC+9:30. Both abbreviations denote a single fixed offset, so this conversion never shifts with daylight saving — what changes is which abbreviation a place is using at the time.