NZDT to COT
-18hNZDT
NZDTSOURCECOT
COTGreen rows indicate typical business hours (9 AM - 5 PM)
NZDT and COT on the World Map
The map below highlights the NZDT (New Zealand Daylight Time) and COT (Colombia Time) timezone regions across the globe.
NZDT – New Zealand Daylight Time
UTC+13:00New Zealand Daylight Time (NZDT, UTC+13:00) is New Zealand's summer time zone, one of the earliest offsets in the world.
- •NZDT runs from the last Sunday in September to the first Sunday in April.
- •NZDT is UTC+13:00 — one of the earliest time offsets used anywhere.
- •New Zealand changes its clocks two to three weeks before Australia.
- •The Chatham Islands observe UTC+13:45 during their summer time.
COT – Colombia Time
UTC-05:00Colombia Time (COT) is the standard time for Colombia, 5 hours behind UTC.
- •Colombia does not observe daylight saving time.
- •COT is the same offset as EST (UTC-05:00).
- •Bogotá sits at 2,640m elevation, making it one of the highest capital cities.
Understanding the -18h Gap: NZDT vs COT
NZDT runs on New Zealand Daylight Time (NZDT) at UTC+13:00. COT runs on Colombia Time (COT) at UTC-05:00. That puts NZDT 18 hours behind COT — a difference of -18h at the current offsets.
In practice, when it is 9:00 AM in NZDT it is 3:00 PM in COT on the previous day. Midnight in NZDT is 6:00 AM in COT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
NZDT to COT time conversion table
| NZDT (NZDT) | COT (COT) | Day |
|---|---|---|
| 12:00 AM | 6:00 AM | previous day |
| 6:00 AM | 12:00 PM | previous day |
| 7:00 AM | 1:00 PM | previous day |
| 8:00 AM | 2:00 PM | previous day |
| 9:00 AM | 3:00 PM | previous day |
| 12:00 PM | 6:00 PM | previous day |
| 3:00 PM | 9:00 PM | previous day |
| 5:00 PM | 11:00 PM | previous day |
| 6:00 PM | 12:00 AM | same day |
| 9:00 PM | 3:00 AM | same day |
Why people convert NZDT to COT time
- Scheduling a call from NZDT to COT: a 10:00 AM start in NZDT lands at 4:00 PM in COT the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -18h gap: NZDT and COT have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in COT is 3:00 PM in NZDT.
- Booking travel or deliveries: tracking COT local time against NZDT keeps pickup windows and arrival estimates honest across the -18h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM NZDT" is unambiguous; "3 PM" across a -18h gap is not.
- With a -18h gap there is no shared 9-to-5 window, so alternate the early start: one week NZDT takes the early slot, the next week COT does.
About NZDT (New Zealand Daylight Time)
New Zealand Daylight Time (NZDT) is the summer time zone for New Zealand, one hour ahead of New Zealand Standard Time (NZST, UTC+12:00). It runs from the last Sunday in September to the first Sunday in April, so New Zealand shifts a week or two earlier in spring than Australia. At UTC+13:00, NZDT is among the earliest offsets in the world — only Samoa, Tonga and parts of Kiribati run further ahead at certain times of year. Auckland and Wellington are 13 hours ahead of UTC during NZDT, 12 hours ahead of Sydney, and 18 hours ahead of New York. The Chatham Islands, 45 minutes further east, move to UTC+13:45.
About COT (Colombia Time)
Colombia Time (COT) is used throughout Colombia. Colombia does not observe daylight saving time. COT shares the same offset as EST (UTC-05:00). Bogotá, the capital, is one of the largest cities in South America.
Best time to call between NZDT and COT
With a -18h offset there is no overlap inside a normal 9 AM – 5 PM day. COT opens at 9:00 AM COT, which is 3:00 PM in NZDT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
NZDT and COT have no shared working hours because of the -18h gap. Teams need to alternate early starts or rely on asynchronous handovers.
NZDT is 18 hours behind COT (NZDT UTC+13:00 → COT UTC-05:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
NZDT
☀ Currently in DST
Standard: UTC+12:00 · DST: UTC+13:00
Clocks fall back on Sat, Apr 3, 2027
COT
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 NZDT and COT?
NZDT (NZDT, UTC+13:00) is 18 hours behind COT (COT, UTC-05:00). The gap is currently -18h.
How do I convert NZDT time to COT time?
Add -18h to NZDT local time. For example, 9:00 AM in NZDT is 3:00 PM in COT (previous day).
What time is it in COT right now?
COT uses COT at UTC-05:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -18h offset from NZDT.
What is the best time to call COT from NZDT?
There is no shared working-hours window because of the -18h gap. The closest option is 1:00 PM in NZDT, which is 7:00 PM in COT.
Which is behind, NZDT or COT?
NZDT is 18 hours behind COT. When it is 12:00 PM in NZDT it is 6:00 PM in COT.
Does daylight saving time affect the NZDT–COT difference?
Neither zone observes daylight saving time, so the -18h offset between NZDT and COT is fixed all year.
Which other cities share NZDT's time zone?
NZDT also covers Auckland, Wellington, Christchurch, Hamilton, Dunedin.
Which countries use NZDT, NZDT's zone?
NZDT is used in New Zealand.
Is there a day difference between NZDT and COT?
Sometimes. The -18h gap is large enough that 8:00 PM or later in NZDT already falls on the in COT.
What is the time difference between NZDT and COT?
COT is -18h from NZDT.
What timezone is NZDT in?
NZDT operates on its local timezone.
What timezone is COT in?
COT operates on its local timezone.
Which countries use NZDT (New Zealand Daylight Time)?
NZDT is used in New Zealand.
Does NZDT observe daylight saving time?
Yes, NZDT switches to NZDT during summer months.
What are some interesting facts about NZDT?
NZDT runs from the last Sunday in September to the first Sunday in April. NZDT is UTC+13:00 — one of the earliest time offsets used anywhere.
Which cities are in the COT timezone?
Major cities in the COT timezone include Bogotá, Medellín, Cali, Barranquilla, Cartagena.
What is the UTC offset for COT?
Colombia Time (COT) is at UTC-05:00.
What should I know about the COT timezone?
Colombia does not observe daylight saving time. COT is the same offset as EST (UTC-05:00).
When is it midnight in NZDT, what time is it in COT?
When it is 12:00 AM (midnight) in NZDT (NZDT), it is -18h later in COT (COT).
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