EEST to ACST
+6h 30mEEST
EESTSOURCEACST
ACSTGreen rows indicate typical business hours (9 AM - 5 PM)
EEST and ACST on the World Map
The map below highlights the EEST (Eastern European Summer Time) and ACST (Australian Central Standard Time) timezone regions across the globe.
EEST – Eastern European Summer Time
UTC+03:00Eastern European Summer Time (EEST, UTC+03:00) is the daylight saving period across eastern Europe, from late March to late October.
- •EEST runs from the last Sunday in March to the last Sunday in October.
- •EEST is one hour ahead of Eastern European Time (EET, UTC+02:00).
- •During EEST, eastern Europe is level with Moscow, Istanbul and Riyadh.
- •EEST follows the EU-wide summer time schedule.
ACST – Australian Central Standard Time
UTC+09:30Australian Central Standard Time (ACST, UTC+09:30) covers South Australia and the Northern Territory, on a half-hour offset.
- •ACST uses a half-hour offset: UTC+09:30.
- •South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
- •Adelaide and Darwin are 30 minutes apart during daylight saving, level in winter.
- •Adelaide is one of the few major cities on a 30-minute offset.
Time Conversion Guide: EEST to ACST
EEST runs on Eastern European Summer Time (EEST) at UTC+03:00. ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. That puts EEST 6 hours 30 minutes ahead of ACST — a difference of +6h 30m at the current offsets.
In practice, when it is 9:00 AM in EEST it is 3:30 PM in ACST. Midnight in EEST is 6:30 AM in ACST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
EEST to ACST time conversion table
| EEST (EEST) | ACST (ACST) | Day |
|---|---|---|
| 12:00 AM | 6:30 AM | same day |
| 6:00 AM | 12:30 PM | same day |
| 7:00 AM | 1:30 PM | same day |
| 8:00 AM | 2:30 PM | same day |
| 9:00 AM | 3:30 PM | same day |
| 12:00 PM | 6:30 PM | same day |
| 3:00 PM | 9:30 PM | same day |
| 5:00 PM | 11:30 PM | same day |
| 6:00 PM | 12:30 AM | next day |
| 9:00 PM | 3:30 AM | next day |
Why people convert EEST to ACST time
- Scheduling a call from EEST to ACST: a 10:00 AM start in EEST lands at 4:30 PM in ACST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both EEST and ACST are inside the 9-to-5 working day between 9:00 AM and 10:30 AM EEST time (3:30 PM–5:00 PM ACST). That is roughly 1 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking ACST local time against EEST keeps pickup windows and arrival estimates honest across the +6h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM EEST" is unambiguous; "3 PM" across a +6h 30m gap is not.
- Block 9:00 AM–10:30 AM EEST as the recurring meeting window if you work primarily from EEST and need ACST colleagues present.
About EEST (Eastern European Summer Time)
Eastern European Summer Time (EEST) is the daylight saving period used across eastern Europe, when clocks move one hour forward from Eastern European Time (EET, UTC+02:00) to UTC+03:00. It runs from the last Sunday in March to the last Sunday in October, in step with the rest of the European Union. EEST covers Greece, Finland, Romania, Bulgaria, the Baltic states, Ukraine and Moldova, and matches the offset used year-round by Moscow, Istanbul and Riyadh during those months. Athens and Helsinki both sit near the western edge of the EEST band, so summer evenings stay light well past 21:00.
About ACST (Australian Central Standard Time)
Australian Central Standard Time (ACST) is the half-hour offset of UTC+09:30 used across South Australia and the Northern Territory, taking in Adelaide and Darwin. South Australia moves to Australian Central Daylight Time (ACDT, UTC+10:30) from the first Sunday in October to the first Sunday in April, but the Northern Territory does not observe daylight saving — so Adelaide and Darwin sit 30 minutes apart in summer and level with each other in winter. The half-hour offset means Adelaide is 30 minutes behind Sydney in winter and level with it during daylight saving, which regularly catches out travellers and meeting planners.
Best time to call between EEST and ACST
Both EEST and ACST sit inside the 9 AM – 5 PM working day between 9:00 AM–10:30 AM EEST, which is 3:30 PM–5:00 PM ACST. That gives roughly 1 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
EEST and ACST overlap for only 90 minutes (9:00 AM–10:30 AM EEST), so meetings have to be booked precisely.
EEST is 6 hours 30 minutes ahead of ACST (EEST UTC+03:00 → ACST UTC+09:30). The shared working window is 9:00 AM–10:30 AM EEST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
EEST
☀ Currently in DST
Standard: UTC+02:00 · DST: UTC+03:00
Clocks fall back on Sun, Oct 25, 2026
ACST
❄ Currently in Standard Time
Standard: UTC+09:30 · DST: UTC+10:30
Clocks spring forward on Sat, Oct 3, 2026
⚠ These locations are currently in different DST states, so the time difference may change when clocks adjust.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between EEST and ACST?
EEST (EEST, UTC+03:00) is 6 hours 30 minutes ahead of ACST (ACST, UTC+09:30). The gap is currently +6h 30m.
How do I convert EEST time to ACST time?
Add +6h 30m to EEST local time. For example, 9:00 AM in EEST is 3:30 PM in ACST.
What time is it in ACST right now?
ACST uses ACST at UTC+09:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +6h 30m offset from EEST.
What is the best time to call ACST from EEST?
Call between 9:00 AM and 10:30 AM EEST — that maps to 3:30 PM–5:00 PM ACST and keeps both parties inside the working day.
Which is ahead, EEST or ACST?
EEST is 6 hours 30 minutes ahead of ACST. When it is 12:00 PM in EEST it is 6:30 PM in ACST.
Does daylight saving time affect the EEST–ACST difference?
Neither zone observes daylight saving time, so the +6h 30m offset between EEST and ACST is fixed all year.
Which other cities share EEST's time zone?
EEST also covers Athens, Helsinki, Bucharest, Sofia, Kyiv, Riga.
Which countries use EEST, EEST's zone?
EEST is used in Greece, Finland, Romania, Bulgaria, Estonia, Latvia, Lithuania, Ukraine and 2 more.
Is there a day difference between EEST and ACST?
Not normally. The +6h 30m gap only pushes the date over for late-evening times.
What is the time difference between EEST and ACST?
ACST is +6h 30m from EEST.
What timezone is EEST in?
EEST operates on its local timezone.
What timezone is ACST in?
ACST operates on its local timezone.
Which countries use EEST (Eastern European Summer Time)?
EEST is used in Greece, Finland, Romania, Bulgaria, Estonia, Latvia, and 4 more countries.
Does EEST observe daylight saving time?
Yes, EEST switches to EEST during summer months.
What are some interesting facts about EEST?
EEST runs from the last Sunday in March to the last Sunday in October. EEST is one hour ahead of Eastern European Time (EET, UTC+02:00).
Which cities are in the ACST timezone?
Major cities in the ACST timezone include Adelaide, Darwin, Alice Springs, Mount Gambier.
What is the UTC offset for ACST?
Australian Central Standard Time (ACST) is at UTC+09:30. During daylight saving time, it shifts to ACDT.
What should I know about the ACST timezone?
ACST uses a half-hour offset: UTC+09:30. South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
When is it midnight in EEST, what time is it in ACST?
When it is 12:00 AM (midnight) in EEST (EEST), it is +6h 30m later in ACST (ACST).
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See every conversion from EEST →·See every conversion from ACST →