ACST to Nepal
-3h 45mACST
ACSTSOURCENepal
NPTGreen rows indicate typical business hours (9 AM - 5 PM)
ACST and NPT on the World Map
The map below highlights the ACST (Australian Central Standard Time) and NPT (Nepal Time) timezone regions across the globe.
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.
NPT – Nepal Time
UTC+05:45Nepal Time (NPT, UTC+05:45) is the time zone for Nepal — one of the few offsets in the world set on a 45-minute increment.
- •Nepal Time is UTC+05:45 — a 45-minute offset, not a whole or half hour.
- •The 45-minute offset was adopted in 1986 to match Kathmandu's solar time.
- •Nepal does not observe daylight saving time.
- •Nepal is 15 minutes ahead of India, despite sharing a long open border.
Comparing Time Zones: ACST and Nepal
ACST runs on Australian Central Standard Time (ACST) at UTC+09:30. Nepal runs on Nepal Time (NPT) at UTC+05:45. That puts ACST 3 hours 45 minutes behind Nepal — a difference of -3h 45m at the current offsets.
In practice, when it is 9:00 AM in ACST it is 5:15 AM in Nepal. Midnight in ACST is 8:15 PM in Nepal. Neither zone observes daylight saving time, so the offset between them stays constant all year.
ACST to Nepal time conversion table
| ACST (ACST) | Nepal (NPT) | Day |
|---|---|---|
| 12:00 AM | 8:15 PM | previous day |
| 6:00 AM | 2:15 AM | same day |
| 7:00 AM | 3:15 AM | same day |
| 8:00 AM | 4:15 AM | same day |
| 9:00 AM | 5:15 AM | same day |
| 12:00 PM | 8:15 AM | same day |
| 3:00 PM | 11:15 AM | same day |
| 5:00 PM | 1:15 PM | same day |
| 6:00 PM | 2:15 PM | same day |
| 9:00 PM | 5:15 PM | same day |
Why people convert ACST to Nepal time
- Scheduling a call from ACST to Nepal: a 10:00 AM start in ACST lands at 6:15 AM in Nepal, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both ACST and Nepal are inside the 9-to-5 working day between 12:45 PM and 5:00 PM ACST time (9:00 AM–1:15 PM NPT). That is roughly 4 hours 15 minutes of usable overlap.
- Watching a live event or market open: ACST viewers need 5:15 AM in Nepal to catch a 9:00 AM start there, and 3:45 AM if the event is anchored to ACST.
- Always state the zone abbreviation, not just the hour. "3:00 PM ACST" is unambiguous; "3 PM" across a -3h 45m gap is not.
- Block 12:45 PM–5:00 PM ACST as the recurring meeting window if you work primarily from ACST and need Nepal colleagues present.
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.
About NPT (Nepal Time)
Nepal Time (NPT) runs at UTC+05:45, one of only a handful of time zones worldwide that are not a whole or half hour from UTC. Nepal set its offset to 5 hours 45 minutes ahead of UTC in 1986 to mark the country's position between the 75°E and 90°E meridians; Kathmandu's solar time sits just over 5 hours 41 minutes ahead of Greenwich, so the 45-minute offset tracks the sun more closely than either 5:30 or 6:00 would. Nepal does not observe daylight saving time, so NPT is fixed all year. The offset makes Nepal 15 minutes ahead of India Standard Time (UTC+05:30) and 2 hours 15 minutes ahead of Dubai (UTC+04:00).
Best time to call between ACST and Nepal
Both ACST and Nepal sit inside the 9 AM – 5 PM working day between 12:45 PM–5:00 PM ACST, which is 9:00 AM–1:15 PM NPT. That gives roughly 4 hours and 15 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
ACST and Nepal overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
ACST is 3 hours 45 minutes behind Nepal (ACST UTC+09:30 → NPT UTC+05:45). The shared working window is 12:45 PM–5:00 PM ACST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
ACST
❄ Currently in Standard Time
Standard: UTC+09:30 · DST: UTC+10:30
Clocks spring forward on Sat, Oct 3, 2026
Nepal
Does not observe DST
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 ACST and Nepal?
ACST (ACST, UTC+09:30) is 3 hours 45 minutes behind Nepal (NPT, UTC+05:45). The gap is currently -3h 45m.
How do I convert ACST time to Nepal time?
Add -3h 45m to ACST local time. For example, 9:00 AM in ACST is 5:15 AM in Nepal.
What time is it in Nepal right now?
Nepal uses NPT at UTC+05:45. Use the live converter at the top of this page — it updates in real time and already accounts for the -3h 45m offset from ACST.
What is the best time to call Nepal from ACST?
Call between 12:45 PM and 5:00 PM ACST — that maps to 9:00 AM–1:15 PM NPT and keeps both parties inside the working day.
Which is behind, ACST or Nepal?
ACST is 3 hours 45 minutes behind Nepal. When it is 12:00 PM in ACST it is 8:15 AM in Nepal.
Do ACST and Nepal use different time zones?
ACST uses ACST at UTC+09:30, while Nepal (Nepal) uses NPT at UTC+05:45. The IANA identifiers are Australia/Adelaide and Asia/Kathmandu.
Does daylight saving time affect the ACST–Nepal difference?
Neither zone observes daylight saving time, so the -3h 45m offset between ACST and Nepal is fixed all year.
Which other cities share ACST's time zone?
ACST also covers Adelaide, Darwin, Alice Springs, Mount Gambier.
Which countries use ACST, ACST's zone?
ACST is used in Australia (South Australia, Northern Territory).
Is there a day difference between ACST and Nepal?
Not normally. The -3h 45m gap only pushes the date over the previous day.
What is the time difference between ACST and Nepal?
Nepal is -3h 45m from ACST.
What timezone is ACST in?
ACST operates on its local timezone.
What timezone is Nepal in?
Nepal operates on its local timezone.
Which countries use ACST (Australian Central Standard Time)?
ACST is used in Australia (South Australia, Northern Territory).
Does ACST observe daylight saving time?
Yes, ACST switches to ACDT during summer months.
What are some interesting facts about ACST?
ACST uses a half-hour offset: UTC+09:30. South Australia moves to ACDT (UTC+10:30) in summer; the Northern Territory does not.
Which cities are in the NPT timezone?
Major cities in the NPT timezone include Kathmandu, Pokhara, Lalitpur, Bharatpur, Biratnagar.
What is the UTC offset for NPT?
Nepal Time (NPT) is at UTC+05:45.
What should I know about the NPT timezone?
Nepal Time is UTC+05:45 — a 45-minute offset, not a whole or half hour. The 45-minute offset was adopted in 1986 to match Kathmandu's solar time.
When is it midnight in ACST, what time is it in Nepal?
When it is 12:00 AM (midnight) in ACST (ACST), it is -3h 45m later in Nepal (NPT).
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