CDT to MDT
-1hCDT
CDTSOURCEMDT
MDTGreen rows indicate typical business hours (9 AM - 5 PM)
CDT and MDT on the World Map
The map below highlights the CDT (Central Daylight Time) and MDT (Mountain Daylight Time) timezone regions across the globe.
CDT – Central Daylight Time
UTC-05:00Central Daylight Time (CDT) is the daylight saving offset in the Central Time Zone, 5 hours behind UTC.
- •CDT is the same offset as EST (UTC-05:00), which can cause confusion.
- •CDT runs from the second Sunday in March to the first Sunday in November.
MDT – Mountain Daylight Time
UTC-06:00Mountain Daylight Time (MDT) is the daylight saving offset in the Mountain Time Zone, 6 hours behind UTC.
- •MDT shares the same offset as CST (UTC-06:00).
- •Arizona does not switch to MDT, remaining on MST.
Understanding the -1h Gap: CDT vs MDT
CDT runs on Central Daylight Time (CDT) at UTC-05:00. MDT runs on Mountain Daylight Time (MDT) at UTC-06:00. That puts CDT 1 hour behind MDT — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in CDT it is 8:00 AM in MDT. Midnight in CDT is 11:00 PM in MDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
CDT to MDT time conversion table
| CDT (CDT) | MDT (MDT) | Day |
|---|---|---|
| 12:00 AM | 11:00 PM | previous day |
| 6:00 AM | 5:00 AM | same day |
| 7:00 AM | 6:00 AM | same day |
| 8:00 AM | 7:00 AM | same day |
| 9:00 AM | 8:00 AM | same day |
| 12:00 PM | 11:00 AM | same day |
| 3:00 PM | 2:00 PM | same day |
| 5:00 PM | 4:00 PM | same day |
| 6:00 PM | 5:00 PM | same day |
| 9:00 PM | 8:00 PM | same day |
Why people convert CDT to MDT time
- Scheduling a call from CDT to MDT: a 10:00 AM start in CDT lands at 9:00 AM in MDT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both CDT and MDT are inside the 9-to-5 working day between 10:00 AM and 5:00 PM CDT time (9:00 AM–4:00 PM MDT). That is roughly 7 hours of usable overlap.
- Watching a live event or market open: CDT viewers need 8:00 AM in MDT to catch a 9:00 AM start there, and 1:00 AM if the event is anchored to CDT.
- Always state the zone abbreviation, not just the hour. "3:00 PM CDT" is unambiguous; "3 PM" across a -1h gap is not.
- Block 10:00 AM–5:00 PM CDT as the recurring meeting window if you work primarily from CDT and need MDT colleagues present.
About CDT (Central Daylight Time)
Central Daylight Time (CDT) is observed during summer months in the US and Canadian portions of the Central Time Zone. Clocks are moved forward by one hour, aligning with Eastern Standard Time (EST). Most of Mexico and Central America do not observe CDT, staying on CST year-round.
About MDT (Mountain Daylight Time)
Mountain Daylight Time (MDT) is observed during summer months in the Mountain Time Zone, except in Arizona which stays on MST year-round. MDT aligns with Central Standard Time (CST) at UTC-06:00.
Best time to call between CDT and MDT
Both CDT and MDT sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM CDT, which is 9:00 AM–4:00 PM MDT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
CDT and MDT share 7 hours of working-hours overlap (10:00 AM–5:00 PM CDT), so scheduling a live meeting is straightforward.
CDT is 1 hour behind MDT (CDT UTC-05:00 → MDT UTC-06:00). The shared working window is 10:00 AM–5:00 PM CDT. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
CDT
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
MDT
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
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 CDT and MDT?
CDT (CDT, UTC-05:00) is 1 hour behind MDT (MDT, UTC-06:00). The gap is currently -1h.
How do I convert CDT time to MDT time?
Add -1h to CDT local time. For example, 9:00 AM in CDT is 8:00 AM in MDT.
What time is it in MDT right now?
MDT uses MDT at UTC-06:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from CDT.
What is the best time to call MDT from CDT?
Call between 10:00 AM and 5:00 PM CDT — that maps to 9:00 AM–4:00 PM MDT and keeps both parties inside the working day.
Which is behind, CDT or MDT?
CDT is 1 hour behind MDT. When it is 12:00 PM in CDT it is 11:00 AM in MDT.
Does daylight saving time affect the CDT–MDT difference?
Neither zone observes daylight saving time, so the -1h offset between CDT and MDT is fixed all year.
Which other cities share CDT's time zone?
CDT also covers Chicago, Houston, Dallas, Austin, Winnipeg, Nashville.
Which countries use CDT, CDT's zone?
CDT is used in United States (Central), Canada (Manitoba).
Is there a day difference between CDT and MDT?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between CDT and MDT?
MDT is -1h from CDT.
What timezone is CDT in?
CDT operates on its local timezone.
What timezone is MDT in?
MDT operates on its local timezone.
Which countries use CDT (Central Daylight Time)?
CDT is used in United States (Central), Canada (Manitoba).
Does CDT observe daylight saving time?
Yes, CDT switches to CST during summer months.
What are some interesting facts about CDT?
CDT is the same offset as EST (UTC-05:00), which can cause confusion. CDT runs from the second Sunday in March to the first Sunday in November.
Which cities are in the MDT timezone?
Major cities in the MDT timezone include Denver, Calgary, Edmonton, Salt Lake City, Boise.
What is the UTC offset for MDT?
Mountain Daylight Time (MDT) is at UTC-06:00. During daylight saving time, it shifts to MST.
What should I know about the MDT timezone?
MDT shares the same offset as CST (UTC-06:00). Arizona does not switch to MDT, remaining on MST.
When is it midnight in CDT, what time is it in MDT?
When it is 12:00 AM (midnight) in CDT (CDT), it is -1h later in MDT (MDT).
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See every conversion from CDT →·See every conversion from MDT →