ADT to ACDT Converter
ADT to ACDT, made simple. ACDT is 13 hours and 30 minutes ahead of ADT. Change the time or date in either card and the conversion follows along instantly.
Daylight saving notes
In the United States and Canada, daylight saving time runs from the second Sunday in March to the first Sunday in November. That affects Atlantic Daylight Time (ADT).
In southern Australia, daylight saving time runs from the first Sunday in October to the first Sunday in April. That affects Australian Central Daylight Time (ACDT).
ADT to ACDT conversion chart
For example, a 9:00 AM ADT meeting takes place at 10:30 PM ACDT. Concretely, when Halifax (ADT) and Adelaide (ACDT) set up a call, aCDT is 13 hours and 30 minutes ahead of ADT.
| ADT time | ACDT time |
|---|---|
| 12:00 AM | 1:30 PM |
| 1:00 AM | 2:30 PM |
| 2:00 AM | 3:30 PM |
| 3:00 AM | 4:30 PM |
| 4:00 AM | 5:30 PM |
| 5:00 AM | 6:30 PM |
| 6:00 AM | 7:30 PM |
| 7:00 AM | 8:30 PM |
| 8:00 AM | 9:30 PM |
| 9:00 AM | 10:30 PM |
| 10:00 AM | 11:30 PM |
| 11:00 AM | 12:30 AM+1 day |
| 12:00 PM | 1:30 AM+1 day |
| 1:00 PM | 2:30 AM+1 day |
| 2:00 PM | 3:30 AM+1 day |
| 3:00 PM | 4:30 AM+1 day |
| 4:00 PM | 5:30 AM+1 day |
| 5:00 PM | 6:30 AM+1 day |
| 6:00 PM | 7:30 AM+1 day |
| 7:00 PM | 8:30 AM+1 day |
| 8:00 PM | 9:30 AM+1 day |
| 9:00 PM | 10:30 AM+1 day |
| 10:00 PM | 11:30 AM+1 day |
| 11:00 PM | 12:30 PM+1 day |
This chart uses the fixed ADT and ACDT offsets; the live converter above follows current daylight saving.
Convert ADT to ACDT Time Zone
A quick guide to ADT → ACDT: the time gap, the live clocks, scheduling tips, and how we keep it accurate.
How does the ADT to ACDT converter work?
It takes three quick steps:
- Click the ADT field on the left and pick the time you want to convert.
- The matching ACDT time updates on the right automatically — there’s no button to press.
- Need a different day? Click the date field and the result follows, rolling over if it crosses midnight.
How many hours apart are ADT and ACDT?
ACDT is 13 hours and 30 minutes ahead of ADT. In everyday terms, once you know the time on one side you just add 13 hours 30 min to get the other — so a call between Halifax and Adelaide is always 13 hours 30 min apart.
What time is it in ACDT right now?
Right now the time in Australian Central Daylight Time (ACDT) is Tuesday, June 30, 2026 · 4:23:57 AM. It ticks every second, so you’re always looking at the live ACDT clock.
What time is it in ADT right now?
And in Atlantic Daylight Time (ADT), it’s currently Monday, June 29, 2026 · 2:53:57 PM. Compare the two and the 13 hours 30 min gap is easy to see.
When is a good time to schedule a ADT to ACDT meeting?
For example, a 9:00 AM ADT meeting takes place at 10:30 PM ACDT. The trick is to aim for a slot that lands inside normal working hours on both sides. Once you’ve found a time, hit Share on the converter to copy a link with the time built in — easy to send to a colleague. Juggling three or more zones? The meeting planner highlights the hours that overlap for everyone.
How does daylight saving affect ADT to ACDT?
The labels ADT and ACDT are fixed offsets, so the result on this page is always exact. Both regions move their clocks for daylight saving on roughly the same weekends, so the 13 hours 30 min gap usually holds steady right through the year.
Why can you trust this ADT to ACDT converter?
Every conversion here is calculated from the IANA time zone database — the same source your phone, computer, and browser rely on. Plenty of tools hard-code a single offset, which quietly goes wrong whenever a region changes its rules or flips for daylight saving. We follow the real rules instead, so ADT to ACDT stays accurate for today and for any past or future date you type in.
Convert ADT to other time zones
- UTC Coordinated Universal Time
- GMT Greenwich Mean Time
- EST Eastern Standard Time
- EDT Eastern Daylight Time
- CST Central Standard Time
- CDT Central Daylight Time
- MST Mountain Standard Time
- MDT Mountain Daylight Time
- PST Pacific Standard Time
- PDT Pacific Daylight Time
- AKST Alaska Standard Time
- AKDT Alaska Daylight Time
- HST Hawaii Standard Time
- AST Atlantic Standard Time
- NST Newfoundland Standard Time
- NDT Newfoundland Daylight Time
- BRT Brasília Time
- ART Argentina Time
- WET Western European Time
- WEST Western European Summer Time
- CET Central European Time
- CEST Central European Summer Time
- EET Eastern European Time
- EEST Eastern European Summer Time
- BST British Summer Time
- IST Irish Standard Time
- MSK Moscow Standard Time
- TRT Turkey Time
- WAT West Africa Time
- CAT Central Africa Time
- EAT East Africa Time
- SAST South Africa Standard Time
- GST Gulf Standard Time
- IST Israel Standard Time
- IDT Israel Daylight Time
- IST India Standard Time
- PKT Pakistan Standard Time
- BDT Bangladesh Standard Time
- ICT Indochina Time
- WIB Western Indonesian Time
- WITA Central Indonesian Time
- WIT Eastern Indonesian Time
- CST China Standard Time
- HKT Hong Kong Time
- SGT Singapore Time
- PHT Philippine Time
- JST Japan Standard Time
- KST Korea Standard Time
- AWST Australian Western Standard Time
- ACST Australian Central Standard Time
- ACDT Australian Central Daylight Time
- AEST Australian Eastern Standard Time
- AEDT Australian Eastern Daylight Time
- NZST New Zealand Standard Time
- NZDT New Zealand Daylight Time
Convert to ACDT from other time zones
- UTC Coordinated Universal Time
- GMT Greenwich Mean Time
- EST Eastern Standard Time
- EDT Eastern Daylight Time
- CST Central Standard Time
- CDT Central Daylight Time
- MST Mountain Standard Time
- MDT Mountain Daylight Time
- PST Pacific Standard Time
- PDT Pacific Daylight Time
- AKST Alaska Standard Time
- AKDT Alaska Daylight Time
- HST Hawaii Standard Time
- AST Atlantic Standard Time
- ADT Atlantic Daylight Time
- NST Newfoundland Standard Time
- NDT Newfoundland Daylight Time
- BRT Brasília Time
- ART Argentina Time
- WET Western European Time
- WEST Western European Summer Time
- CET Central European Time
- CEST Central European Summer Time
- EET Eastern European Time
- EEST Eastern European Summer Time
- BST British Summer Time
- IST Irish Standard Time
- MSK Moscow Standard Time
- TRT Turkey Time
- WAT West Africa Time
- CAT Central Africa Time
- EAT East Africa Time
- SAST South Africa Standard Time
- GST Gulf Standard Time
- IST Israel Standard Time
- IDT Israel Daylight Time
- IST India Standard Time
- PKT Pakistan Standard Time
- BDT Bangladesh Standard Time
- ICT Indochina Time
- WIB Western Indonesian Time
- WITA Central Indonesian Time
- WIT Eastern Indonesian Time
- CST China Standard Time
- HKT Hong Kong Time
- SGT Singapore Time
- PHT Philippine Time
- JST Japan Standard Time
- KST Korea Standard Time
- AWST Australian Western Standard Time
- ACST Australian Central Standard Time
- AEST Australian Eastern Standard Time
- AEDT Australian Eastern Daylight Time
- NZST New Zealand Standard Time
- NZDT New Zealand Daylight Time
Frequently asked questions
How many hours ahead of ADT is ACDT?
ACDT is 13 hours and 30 minutes ahead of ADT — a fixed 13 hours and 30 minutes difference, since both are fixed-offset labels.
What time is it in ACDT when it's 12:00 PM ADT?
When it's 12:00 PM (noon) ADT, it's 1:30 AM ACDT the next day.
Do ADT or ACDT use daylight saving time?
Atlantic Daylight Time (ADT) observes daylight saving, alternating with AST; Australian Central Daylight Time (ACDT) observes daylight saving, alternating with ACST.
Why might the real-world ADT–ACDT difference change during the year?
The labels ADT and ACDT are fixed offsets, so this converter is always exact. But Atlantic Daylight Time's region switches between standard and summer time, so for part of the year you may actually want AST to ACDT. Always check which label a region is currently using before you schedule.