Weekday Counter
Check how many times each weekday is included from Monday to Sunday during the period.
Input
The example value has been entered. Check it immediately or change the value.
Input is processed in the browser. Refreshing returns a sample value.
Result
Check or change the value using the example value result.
Select the day of the calendar regardless of holidays. Maximum period is 10 years.
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Calculation·conversion criteria
Count how many times each weekday is included from Monday to Sunday during the period.
Input example
2026-10-02~12: Friday, Saturday, Sunday, and Monday each have 2 sessions
Monday through the following Sunday is a 7-day period with each weekday occurring once. If the start date is the preceding Sunday instead, Sunday occurs twice.
How to use
- Use the entered example value or change the start date and end date items.
- Click Verify result and check the following result.
- Result can be copied if needed.
Frequently Asked Questions
Can the day count be used as commute days?
This result is a calendar count that ignores holidays and closed days. It can be used to determine the number of classes on specific days, but actual workdays should be excluded from the regular days.
Calculation criteria and reference materials
The calculation formula and scope of this tool are disclosed in the above description. Examples can be checked by substituting input values into the formula or following the specified string and calendar handling rules.
Verification of calculation criteria: · Calculation·verification principles · Report errors