CST to ICT
+13hCST
CSTSOURCEICT
ICTGreen rows indicate typical business hours (9 AM - 5 PM)
CST and ICT on the World Map
The map below highlights the CST (Central Standard Time) and ICT (Indochina Time) timezone regions across the globe.
CST – Central Standard Time
UTC-06:00Central Standard Time (CST) is the time zone for the central United States, Canada, and Mexico, 6 hours behind UTC.
- •CST covers 20 US states fully or partially.
- •Chicago and Houston are the two largest cities in the Central Time Zone.
- •Mexico City, one of the world's most populous cities, operates on CST.
- •CST is 1 hour behind EST and 2 hours ahead of PST.
ICT – Indochina Time
UTC+07:00Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.
- •Bangkok is one of the most visited cities in the world.
- •ICT is 12 hours ahead of EST.
- •Thailand, Vietnam, and Cambodia all share ICT.
Understanding the +13h Gap: CST vs ICT
CST runs on Central Standard Time (CST) at UTC-06:00. ICT runs on Indochina Time (ICT) at UTC+07:00. That puts CST 13 hours ahead of ICT — a difference of +13h at the current offsets.
In practice, when it is 9:00 AM in CST it is 10:00 PM in ICT. Midnight in CST is 1:00 PM in ICT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
CST to ICT time conversion table
| CST (CST) | ICT (ICT) | Day |
|---|---|---|
| 12:00 AM | 1:00 PM | same day |
| 6:00 AM | 7:00 PM | same day |
| 7:00 AM | 8:00 PM | same day |
| 8:00 AM | 9:00 PM | same day |
| 9:00 AM | 10:00 PM | same day |
| 12:00 PM | 1:00 AM | next day |
| 3:00 PM | 4:00 AM | next day |
| 5:00 PM | 6:00 AM | next day |
| 6:00 PM | 7:00 AM | next day |
| 9:00 PM | 10:00 AM | next day |
Why people convert CST to ICT time
- Scheduling a call from CST to ICT: a 10:00 AM start in CST lands at 11:00 PM in ICT, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +13h gap: CST and ICT 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 ICT is 10:00 PM in CST.
- Coordinating a CST-based team with ICT 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 CST" is unambiguous; "3 PM" across a +13h gap is not.
- With a +13h gap there is no shared 9-to-5 window, so alternate the early start: one week CST takes the early slot, the next week ICT does.
About CST (Central Standard Time)
Central Standard Time (CST) covers the central region of North America. It is the second most populous time zone in the US, including major cities like Chicago, Houston, and Dallas. CST is also used in Mexico City and much of Central America including Guatemala, Honduras, El Salvador, and Costa Rica. During summer, most of the US and Canada switch to Central Daylight Time (CDT, UTC-05:00), while Mexico and Central American countries generally remain on CST.
About ICT (Indochina Time)
Indochina Time (ICT) is used across Southeast Asia including Vietnam, Thailand, Laos, and Cambodia. Indonesia (Western time, WIB) also uses UTC+07:00. ICT does not observe daylight saving time.
Best time to call between CST and ICT
With a +13h offset there is no overlap inside a normal 9 AM – 5 PM day. ICT opens at 9:00 AM ICT, which is 10:00 PM in CST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
CST and ICT have no shared working hours because of the +13h gap. Teams need to alternate early starts or rely on asynchronous handovers.
CST is 13 hours ahead of ICT (CST UTC-06:00 → ICT UTC+07:00). 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
CST
☀ Currently in DST
Standard: UTC-06:00 · DST: UTC-05:00
Clocks fall back on Sun, Nov 1, 2026
ICT
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 CST and ICT?
CST (CST, UTC-06:00) is 13 hours ahead of ICT (ICT, UTC+07:00). The gap is currently +13h.
How do I convert CST time to ICT time?
Add +13h to CST local time. For example, 9:00 AM in CST is 10:00 PM in ICT.
What time is it in ICT right now?
ICT uses ICT at UTC+07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +13h offset from CST.
What is the best time to call ICT from CST?
There is no shared working-hours window because of the +13h gap. The closest option is 1:00 PM in CST, which is 2:00 AM in ICT.
Which is ahead, CST or ICT?
CST is 13 hours ahead of ICT. When it is 12:00 PM in CST it is 1:00 AM in ICT.
Does daylight saving time affect the CST–ICT difference?
Neither zone observes daylight saving time, so the +13h offset between CST and ICT is fixed all year.
Which other cities share CST's time zone?
CST also covers Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis and 6 more.
Which countries use CST, CST's zone?
CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, Costa Rica, Nicaragua and 1 more.
Is there a day difference between CST and ICT?
Sometimes. The +13h gap is large enough that 8:00 PM or later in CST already falls on the next day in ICT.
What is the time difference between CST and ICT?
ICT is +13h from CST.
What timezone is CST in?
CST operates on its local timezone.
What timezone is ICT in?
ICT operates on its local timezone.
Which countries use CST (Central Standard Time)?
CST is used in United States (Central), Canada (Manitoba, Saskatchewan), Mexico, Guatemala, Honduras, El Salvador, and 3 more countries.
Does CST observe daylight saving time?
Yes, CST switches to CDT during summer months.
What are some interesting facts about CST?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
Which cities are in the ICT timezone?
Major cities in the ICT timezone include Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
What is the UTC offset for ICT?
Indochina Time (ICT) is at UTC+07:00.
What should I know about the ICT timezone?
Bangkok is one of the most visited cities in the world. ICT is 12 hours ahead of EST.
When is it midnight in CST, what time is it in ICT?
When it is 12:00 AM (midnight) in CST (CST), it is +13h later in ICT (ICT).
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See every conversion from CST →·See every conversion from ICT →