Thailand — January 2026

Thailand businesses have 20 working days in January 2026 — that's 31 calendar days minus 9 weekend days and 2 weekday public holidays (New Year's Day, New Year Special Holiday). The depth of Northern-hemisphere winter and Southern-hemisphere summer typically governs the work-rhythm in January; project deadlines and payroll cycles in Thailand should account for the holiday days listed above. January opens the global calendar with New Year's Day observed in nearly every country and several civic holidays unique to the southern hemisphere. For pay-period planning, January 2026 contains 4 full work-weeks plus 0 additional weekdays, useful when scheduling milestones or quarterly reviews. The working-day count above counts substitute days as a single deduction — it does not double-count when a public holiday falling on a weekend is moved to a Monday or Friday. Use this figure as the authoritative baseline for Thailand payroll-period calculations.

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