Colombo to Mexico
-11h 30mColombo
ISTSOURCEMexico
CSTGreen rows indicate typical business hours (9 AM - 5 PM)
IST and CST on the World Map
The map below highlights the IST (India Standard Time) and CST (Central Standard Time) timezone regions across the globe.
IST – India Standard Time
UTC+05:30India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.
- •India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
- •India uses a single time zone despite spanning 30° of longitude.
- •IST is one of only a handful of time zones with a 30-minute offset.
- •IST is the most populous single time zone in the world with over 1.4 billion people.
- •The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.
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.
About Colombo
WikipediaColombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.
Sri Lanka Standard Time (SLST) uses UTC+5:30, same offset as India.
Colombo vs Mexico: Offsets, DST and Best Call Times
Colombo runs on India Standard Time (IST) at UTC+05:30. Mexico runs on Central Standard Time (CST) at UTC-06:00. That puts Colombo 11 hours 30 minutes behind Mexico — a difference of -11h 30m at the current offsets.
In practice, when it is 9:00 AM in Colombo it is 9:30 PM in Mexico on the previous day. Midnight in Colombo is 12:30 PM in Mexico. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Colombo to Mexico time conversion table
| Colombo (IST) | Mexico (CST) | Day |
|---|---|---|
| 12:00 AM | 12:30 PM | previous day |
| 6:00 AM | 6:30 PM | previous day |
| 7:00 AM | 7:30 PM | previous day |
| 8:00 AM | 8:30 PM | previous day |
| 9:00 AM | 9:30 PM | previous day |
| 12:00 PM | 12:30 AM | same day |
| 3:00 PM | 3:30 AM | same day |
| 5:00 PM | 5:30 AM | same day |
| 6:00 PM | 6:30 AM | same day |
| 9:00 PM | 9:30 AM | same day |
Why people convert Colombo to Mexico time
- Scheduling a call from Colombo to Mexico: a 10:00 AM start in Colombo lands at 10:30 PM in Mexico the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -11h 30m gap: Colombo and Mexico 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 Mexico is 9:30 PM in Colombo.
- Keeping family and friends in sync: knowing that 8:00 PM in Colombo is 8:30 AM in Mexico makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a -11h 30m gap is not.
- With a -11h 30m gap there is no shared 9-to-5 window, so alternate the early start: one week Colombo takes the early slot, the next week Mexico does.
About IST (India Standard Time)
India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.
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.
Best time to call between Colombo and Mexico
With a -11h 30m offset there is no overlap inside a normal 9 AM – 5 PM day. Mexico opens at 9:00 AM CST, which is 9:30 PM in Colombo, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Colombo and Mexico have no shared working hours because of the -11h 30m gap. Teams need to alternate early starts or rely on asynchronous handovers.
Colombo is 11 hours 30 minutes behind Mexico (IST UTC+05:30 → CST UTC-06:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
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 Colombo and Mexico?
Colombo (IST, UTC+05:30) is 11 hours 30 minutes behind Mexico (CST, UTC-06:00). The gap is currently -11h 30m.
How do I convert Colombo time to Mexico time?
Add -11h 30m to Colombo local time. For example, 9:00 AM in Colombo is 9:30 PM in Mexico (previous day).
What time is it in Mexico right now?
Mexico uses CST at UTC-06:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -11h 30m offset from Colombo.
What is the best time to call Mexico from Colombo?
There is no shared working-hours window because of the -11h 30m gap. The closest option is 1:00 PM in Colombo, which is 1:30 AM in Mexico.
Which is behind, Colombo or Mexico?
Colombo is 11 hours 30 minutes behind Mexico. When it is 12:00 PM in Colombo it is 12:30 AM in Mexico.
Do Colombo and Mexico use different time zones?
Colombo (Sri Lanka) uses IST at UTC+05:30, while Mexico (Mexico) uses CST at UTC-06:00. The IANA identifiers are Asia/Colombo and America/Mexico_City.
Does daylight saving time affect the Colombo–Mexico difference?
Neither zone observes daylight saving time, so the -11h 30m offset between Colombo and Mexico is fixed all year.
Which other cities share Colombo's time zone?
IST also covers Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad and 4 more.
Which countries use IST, Colombo's zone?
IST is used in India, Sri Lanka.
Is there a day difference between Colombo and Mexico?
Not normally. The -11h 30m gap only pushes the date over the previous day.
What is the time difference between Colombo and Mexico?
Mexico is -11h 30m from Colombo.
What timezone is Colombo in?
Colombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.
What timezone is Mexico in?
Mexico operates on its local timezone.
What are the business hours in Colombo?
Standard business hours in Colombo are 9:00 AM - 5:00 PM IST.
Which countries use IST (India Standard Time)?
IST is used in India, Sri Lanka.
Does IST observe daylight saving time?
No, IST does not observe daylight saving time and remains at UTC+05:30 year-round.
What are some interesting facts about IST?
India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT. India uses a single time zone despite spanning 30° of longitude.
Which cities are in the CST timezone?
Major cities in the CST timezone include Chicago, Houston, Dallas, San Antonio, Mexico City, Austin, Winnipeg, Memphis.
What is the UTC offset for CST?
Central Standard Time (CST) is at UTC-06:00. During daylight saving time, it shifts to CDT.
What should I know about the CST timezone?
CST covers 20 US states fully or partially. Chicago and Houston are the two largest cities in the Central Time Zone.
When is it midnight in Colombo, what time is it in Mexico?
When it is 12:00 AM (midnight) in Colombo (IST), it is -11h 30m later in Mexico (CST).
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