COT to NZDT
+18hCOT
COTSOURCENZDT
NZDTGreen rows indicate typical business hours (9 AM - 5 PM)
COT and NZDT on the World Map
The map below highlights the COT (Colombia Time) and NZDT (New Zealand Daylight Time) timezone regions across the globe.
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.
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.
Understanding the +18h Gap: COT vs NZDT
COT runs on Colombia Time (COT) at UTC-05:00. NZDT runs on New Zealand Daylight Time (NZDT) at UTC+13:00. That puts COT 18 hours ahead of NZDT — a difference of +18h at the current offsets.
In practice, when it is 9:00 AM in COT it is 3:00 AM in NZDT on the next day. Midnight in COT is 6:00 PM in NZDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
COT to NZDT time conversion table
| COT (COT) | NZDT (NZDT) | Day |
|---|---|---|
| 12:00 AM | 6:00 PM | same day |
| 6:00 AM | 12:00 AM | next day |
| 7:00 AM | 1:00 AM | next day |
| 8:00 AM | 2:00 AM | next day |
| 9:00 AM | 3:00 AM | next day |
| 12:00 PM | 6:00 AM | next day |
| 3:00 PM | 9:00 AM | next day |
| 5:00 PM | 11:00 AM | next day |
| 6:00 PM | 12:00 PM | next day |
| 9:00 PM | 3:00 PM | next day |
Why people convert COT to NZDT time
- Scheduling a call from COT to NZDT: a 10:00 AM start in COT lands at 4:00 AM in NZDT the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +18h gap: COT and NZDT 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 NZDT is 3:00 AM in COT.
- Coordinating a COT-based team with NZDT contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM COT" 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 COT takes the early slot, the next week NZDT does.
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.
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.
Best time to call between COT and NZDT
With a +18h offset there is no overlap inside a normal 9 AM – 5 PM day. NZDT opens at 9:00 AM NZDT, which is 3:00 AM in COT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
COT and NZDT have no shared working hours because of the +18h gap. Teams need to alternate early starts or rely on asynchronous handovers.
COT is 18 hours ahead of NZDT (COT UTC-05:00 → NZDT UTC+13:00). 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
COT
Does not observe DST
NZDT
☀ Currently in DST
Standard: UTC+12:00 · DST: UTC+13:00
Clocks fall back on Sat, Apr 3, 2027
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 COT and NZDT?
COT (COT, UTC-05:00) is 18 hours ahead of NZDT (NZDT, UTC+13:00). The gap is currently +18h.
How do I convert COT time to NZDT time?
Add +18h to COT local time. For example, 9:00 AM in COT is 3:00 AM in NZDT (next day).
What time is it in NZDT right now?
NZDT uses NZDT at UTC+13:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +18h offset from COT.
What is the best time to call NZDT from COT?
There is no shared working-hours window because of the +18h gap. The closest option is 1:00 PM in COT, which is 7:00 AM in NZDT.
Which is ahead, COT or NZDT?
COT is 18 hours ahead of NZDT. When it is 12:00 PM in COT it is 6:00 AM in NZDT.
Does daylight saving time affect the COT–NZDT difference?
Neither zone observes daylight saving time, so the +18h offset between COT and NZDT is fixed all year.
Which other cities share COT's time zone?
COT also covers Bogotá, Medellín, Cali, Barranquilla, Cartagena.
Which countries use COT, COT's zone?
COT is used in Colombia.
Is there a day difference between COT and NZDT?
Sometimes. The +18h gap is large enough that 8:00 PM or later in COT already falls on the next day in NZDT.
What is the time difference between COT and NZDT?
NZDT is +18h from COT.
What timezone is COT in?
COT operates on its local timezone.
What timezone is NZDT in?
NZDT operates on its local timezone.
Which countries use COT (Colombia Time)?
COT is used in Colombia.
Does COT observe daylight saving time?
No, COT does not observe daylight saving time and remains at UTC-05:00 year-round.
What are some interesting facts about COT?
Colombia does not observe daylight saving time. COT is the same offset as EST (UTC-05:00).
Which cities are in the NZDT timezone?
Major cities in the NZDT timezone include Auckland, Wellington, Christchurch, Hamilton, Dunedin.
What is the UTC offset for NZDT?
New Zealand Daylight Time (NZDT) is at UTC+13:00. During daylight saving time, it shifts to NZDT.
What should I know about the NZDT timezone?
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.
When is it midnight in COT, what time is it in NZDT?
When it is 12:00 AM (midnight) in COT (COT), it is +18h later in NZDT (NZDT).
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See every conversion from COT →·See every conversion from NZDT →