Weekends in Month Calculator
Count weekend days, full weekends, and working days for any month and year
Weekend Days Overview
Your quick reference for weekend and working day counts
Planning your month? The number of weekend days varies between 8 and 10 depending on the month length and starting weekday. This calculator gives you the exact count of weekend days, full weekends, and working days for any month and year.
Quick Answer: Most months have 8 to 10 weekend days and 4 to 5 full weekends. Enter a month and year above to get the exact breakdown.
ISO 8601 Precision
Uses international weekday numbering standard
Two Conventions
Supports Western (Sat-Sun) and Middle Eastern (Fri-Sat)
The calculator uses a deterministic formula based on ISO 8601 weekday numbering (Monday = 1, Sunday = 7).
F_d = 1 + ((d - W + 7) mod 7)Once you know when a weekday first appears, counting its total occurrences is straightforward:
C_d = floor((N - F_d) / 7) + 1The total weekend days is the sum of both weekend day counts. Integer modulo arithmetic is exact, so no floating-point errors can occur.
March 2026 has 31 days and starts on a Sunday (ISO weekday 7).
Count Saturdays (d = 6)
F = 1 + ((6 - 7 + 7) \bmod 7) = 1 + 6 = 7Count Sundays (d = 7)
F = 1 + ((7 - 7 + 7) \bmod 7) = 1 + 0 = 1Calculate Totals
Weekend Days
4 + 5 = 9 weekend days
Full Weekends
min(4, 5) = 4 full weekends
Partial Weekend Days
9 - 2 × 4 = 1 (the lone Sunday on March 1)
Working Days
31 - 9 = 22 working days
| Month | Days | Weekend Days | Full Weekends | Working Days |
|---|---|---|---|---|
| January | 31 | 9 | 4 | 22 |
| February | 28 | 8 | 4 | 20 |
| March | 31 | 9 | 4 | 22 |
| April | 30 | 8 | 4 | 22 |
| May | 31 | 10 | 5 | 21 |
| June | 30 | 8 | 4 | 22 |
| July | 31 | 8 | 4 | 23 |
| August | 31 | 10 | 5 | 21 |
| September | 30 | 8 | 4 | 22 |
| October | 31 | 9 | 4 | 22 |
| November | 30 | 9 | 4 | 21 |
| December | 31 | 8 | 4 | 23 |
Not all countries observe the same weekend days:
Western Convention (Saturday-Sunday) Used by most of Europe, the Americas, East Asia, and Oceania. This is the default in most international business contexts.
Middle Eastern Convention (Friday-Saturday) Used in countries such as Israel, Saudi Arabia, and other Gulf states. Friday is the Islamic day of congregational prayer.
Some countries have recently changed their weekend days. The UAE shifted from Friday-Saturday to Saturday-Sunday for government offices in 2022, while keeping Friday as a half-day. This calculator supports the two most common patterns.
Knowing the exact weekend and working day counts helps in several scenarios:
- Payroll: Calculate monthly salary based on actual working days
- Project Planning: Estimate available work days for sprint planning
- Shift Scheduling: Plan weekend shift rotations fairly
- Travel Planning: Maximize weekend trips within a month
- Budgeting: Account for weekend spending patterns