Convert ACDT to KST
KST is 1 hour 30 minutes behind ACDT. ACDT is UTC+10:30 and KST is UTC+9.
Right now: ACDT · KST
Best time to schedule a meeting
Standard 9–5 working hours overlap for 6 hours: 11:00 AM–5:00 PM ACDT (9:00 AM–3:00 PM KST). Schedule meetings inside that window.
| ACDT | KST | Suitable? |
|---|---|---|
| 9:00 AM | 7:30 AM | outside 9–5 |
| 10:00 AM | 8:30 AM | outside 9–5 |
| 11:00 AM | 9:30 AM | working hours |
| 12:00 PM | 10:30 AM | working hours |
| 1:00 PM | 11:30 AM | working hours |
| 2:00 PM | 12:30 PM | working hours |
| 3:00 PM | 1:30 PM | working hours |
| 4:00 PM | 2:30 PM | working hours |
| 5:00 PM | 3:30 PM | working hours |
ACDT to KST conversion table
| ACDT | KST |
|---|---|
| 12:00 AM | 10:30 PM (previous day) |
| 1:00 AM | 11:30 PM (previous day) |
| 2:00 AM | 12:30 AM |
| 3:00 AM | 1:30 AM |
| 4:00 AM | 2:30 AM |
| 5:00 AM | 3:30 AM |
| 6:00 AM | 4:30 AM |
| 7:00 AM | 5:30 AM |
| 8:00 AM | 6:30 AM |
| 9:00 AM | 7:30 AM |
| 10:00 AM | 8:30 AM |
| 11:00 AM | 9:30 AM |
| 12:00 PM | 10:30 AM |
| 1:00 PM | 11:30 AM |
| 2:00 PM | 12:30 PM |
| 3:00 PM | 1:30 PM |
| 4:00 PM | 2:30 PM |
| 5:00 PM | 3:30 PM |
| 6:00 PM | 4:30 PM |
| 7:00 PM | 5:30 PM |
| 8:00 PM | 6:30 PM |
| 9:00 PM | 7:30 PM |
| 10:00 PM | 8:30 PM |
| 11:00 PM | 9:30 PM |
About ACDT
Australian Central Daylight Time (ACDT) is UTC+10:30. It is used in Adelaide in summer.
Australian Central Daylight Time is UTC+10:30, what South Australia keeps from October to April. Darwin stays on ACST through the summer, so for those months two cities in the same nominal zone are an hour apart — the only reason to be precise about which of the two abbreviations a meeting invitation carries.
About KST
Korea Standard Time (KST) is UTC+9. It is used in South Korea, with no daylight saving.
Korea Standard Time is UTC+9, the same as Japan, and South Korea has had no daylight saving since 1988 when it was used for the Seoul Olympics. The two Koreas briefly differed: the North moved to UTC+8:30 in 2015 and returned to UTC+9 in 2018, which is the only time in modern history the peninsula ran on two clocks.
Does this gap change with the seasons?
Neither ACDT nor KST shifts with the seasons, so this 1.5-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 ACDT in KST?
9:00 AM ACDT is 7:30 AM KST.
Is KST ahead of ACDT?
KST is 1 hour 30 minutes behind ACDT.
Which time zone does this use?
ACDT is UTC+10:30 and KST is UTC+9. 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.