Calendaring Calculator

Rule 6(a)(5): a backward period is counted backward, and a weekend or holiday moves the deadline earlier, not later.
Your own non-working days as YYYY-MM-DD, separated by commas. Added to whichever calendar is selected.
Result date
2024-01-22
Business Day Calculator
Working days
14 days
Calendar days
21 days
Weekend days in the span
6 days
Holidays excluded
1 days
Result date falls on
Monday
Date before any roll-forward
2024-01-22
Days rolled forward
0 days
Start date falls on
Monday
Working days per week
5 days
Counted
forward from the event
Summary
A 21 day period triggered on 2024-01-01 expires on 2024-01-22 (Monday).
Worked out from Microsoft Excel NETWORKDAYS.INTL function specification and 4 other sources.
Holiday calendars differ by employer, court and country. Confirm the applicable holiday list and, for a legal deadline, the governing rule before relying on this date.

How this is worked out

4 steps
  1. Weekend: Saturday and Sunday (5 working day(s) a week).
  2. Holiday calendar: US federal holidays (5 U.S.C. 6103).
  3. Exclude the trigger day 2024-01-01 and count 21 days forward: that reaches 2024-01-22.
  4. 2024-01-22 is a working day, so no roll is needed.
Holidays in the spantable
2024-01-15 Birthday of Martin Luther King, Jr.

Results are general information, not financial, tax, legal, medical or engineering advice.