Find the best time to call Thailand

Thailand uses country code +66 and runs on Indochina Time (ICT), UTC+7, year-round — Thailand does not observe daylight saving, so the offset never changes.

Use this guide to time your calls to land during Thai business hours, whichever time zone you're calling from — and to sidestep the two Thailand-specific traps (the Buddhist Era year on documents, and Songkran functioning as a shutdown week rather than a three-day holiday) that catch out first-time callers.

Thailand runs on a single time zone nationwide: Indochina Time (ICT), UTC+7. There are no regional splits — Bangkok, Chiang Mai, Phuket, and every other part of the country share the same clock.

Thailand also does not observe daylight saving time, so the UTC+7 offset is constant all year. That's a genuine convenience for scheduling: unlike calling countries that shift clocks twice a year, your Thailand call-time math doesn't need to be re-checked every spring and autumn — it stays the same in January and in July.

The sweet spots in Thailand are the late-morning block (9:30 AM–12:00 PM ICT) and the mid-afternoon block (2:00–5:00 PM ICT), sandwiching the widely observed 12:00–1:30 PM lunch break. The table below translates those into your local time.

For US callers, the cleanest overlap is Thailand's afternoon block — 3:00–6:00 AM ET catches Bangkok's 2:00–5:00 PM, though it's an early morning either way. UK callers get the friendliest window: 9:00 AM–noon UK (winter) reaches Bangkok's 2:00–5:00 PM afternoon session. Singapore, Malaysia and Vietnam callers have it easiest — Thailand shares their clock, so any point in your business day works.

Thailand's standard work week runs Monday through Friday, with most offices operating on a typical business schedule — roughly 9:00 AM–5:00 PM ICT, with a widely observed lunch break from about 12:00 PM to 1:30 PM.

Consumer contacts are easier to reach on weekday evenings (roughly 6:00–8:00 PM ICT), after the workday has ended but before it gets too late. Weekends (Saturday and Sunday) are effectively closed for business calls.

Two Thailand-specific factors reshape scheduling in ways the standard clock doesn't capture: the Buddhist Era (B.E.) calendar on Thai documents, and Songkran as a multi-day shutdown rather than a three-day holiday. Both are covered below.

Aim for Tuesday through Thursday. Mondays absorb the week's backlog; Friday afternoons wind down early.

Seasonally, Songkran (Thai New Year, 13–15 April) is the single biggest thing to plan around. Unlike a normal three-day public holiday, Songkran functions as one of Thailand's most significant national shutdown periods — combined with weekends and bridge days, effective closures often stretch to a full week or more. Treat the days immediately before, during, and after 13–15 April as a period to avoid rather than just the three official calendar days.

Buddhist Lent (Khao Phansa) in July–August, plus lunar-Buddhist holidays (Makha Bucha, Visakha Bucha, Asalha Bucha) that shift each year, produce additional single-day closures. Combined with Thailand's royal-birthday and national-day observances scattered across the year, always cross-check against a current-year Thai public holiday calendar before scheduling anything time-sensitive.

On these dates, most offices are closed. Several Thai public holidays follow the lunar calendar and shift each year — the dates below are the widely projected 2026 windows for those, verify closer to publication. Where a fixed holiday falls on a weekend, an in-lieu (substitute) working-day off is typically added on the following Monday.

• New Year's Day — Thursday, 1 January 2026
• Makha Bucha (lunar) — Tuesday, 3 March 2026
• Chakri Memorial Day — Monday, 6 April 2026
• Songkran Festival (Thai New Year) — Monday–Wednesday, 13–15 April 2026
• Labour Day — Friday, 1 May 2026
• Coronation Day (King Vajiralongkorn) — Monday, 4 May 2026
• Visakha Bucha (lunar) — Sunday, 31 May 2026 (in-lieu Monday)
• HM Queen Suthida's Birthday — Wednesday, 3 June 2026
• HM King Vajiralongkorn's Birthday — Tuesday, 28 July 2026
• Asalha Bucha (lunar) / Buddhist Lent begins — Wednesday–Thursday, 29–30 July 2026
• HM Queen Sirikit's Birthday / Mother's Day — Wednesday, 12 August 2026
• King Bhumibol Memorial Day — Tuesday, 13 October 2026
• Chulalongkorn Day — Friday, 23 October 2026
• HM King Bhumibol's Birthday / Father's Day — Saturday, 5 December 2026 (in-lieu Monday)
• Constitution Day — Thursday, 10 December 2026
• New Year's Eve — Thursday, 31 December 2026

Songkran (13–15 April) is far more disruptive than the three official dates suggest — assume reduced availability across most of April 12–17, and confirm your specific contact's schedule for that week. Lunar-Buddhist holidays (Makha Bucha, Visakha Bucha, Asalha Bucha) genuinely move each Gregorian year — always cross-check against a current Thai public holiday calendar rather than assuming last year's dates.

The working language for international business is English, widely used in Bangkok, tourism, banking, telecom, and multinational settings. Local business happens in Thai (ภาษาไทย); a greeting in Thai — Sawadee khrap (spoken by men) or Sawadee kha (spoken by women) — always lands well and is standard courtesy. Basic use of the accompanying wai (a slight bow with palms together) is appreciated on video calls.

Business culture is relationship-first and hierarchy-aware. Address contacts by first name preceded by Khun (a respectful honorific used regardless of gender — e.g., "Khun Somchai"). Save-face dynamics matter: avoid public criticism, direct confrontation, or anything that could embarrass a contact in front of colleagues. Warm, indirect communication tends to build trust faster than a hard, fast pitch.

Written follow-up matters. Because Thai documents may reference dates in the Buddhist Era calendar (see below), and lunar-Buddhist holidays move each year, a written confirmation of dates, times and next steps — in standard Gregorian dates and ICT — prevents the most common misalignments.

• Forgetting Thailand has no daylight saving time. Callers sometimes assume Thailand's offset shifts along with their own country's clock changes — it doesn't. Only your side of the calculation moves.
• Scheduling around Songkran as if it were a single-day holiday. Treating 13–15 April like an ordinary three-day public holiday can mean missing multi-day office closures that extend well beyond the official dates — plan around the full week.
• Misreading a Buddhist Era year as a typo or error. A Thai document showing what looks like an unusually high year (e.g., a four-digit year 543 higher than expected) isn't a mistake — it's a B.E. year. Subtract 543 to convert to Gregorian.
• Calling during the midday lunch break. Many Thai offices step away between roughly 12:00 PM and 1:30 PM local time; calls placed in this window often go unanswered even on an otherwise normal business day.
• Assuming lunar-Buddhist holidays repeat on the same Gregorian date each year. Makha Bucha, Visakha Bucha and Asalha Bucha move — check a current-year Thai calendar, don't reuse last year's dates.
• Skipping the greeting and honorific. Jumping straight into business without *Sawadee khrap/kha* and a proper *Khun* + first name address reads as rushed. Small courtesies open more doors than they cost.

The simplest way to stay inside the right window is to block your own calendar against Thailand's afternoon session and treat 3:00–6:00 AM ET — or the UK morning slot — as your standing call time, Tuesday through Thursday. A shared calendar invite that auto-converts zones removes the guesswork.

A local Thailand +66 virtual number helps too: a Thai caller ID looks familiar and gets answered more readily than an unknown international string. My Country Mobile offers +66 virtual numbers with local area codes — including Bangkok (02) and Chiang Mai (053) — routed to any device, anywhere. Backed by MCM's network reaching 190+ countries with 99.99% uptime, it lets a US, UK or Asian-regional team present a genuinely local Thai presence without a physical office in Bangkok.