Business Day Calculator
Shift a date by N business days or count the business days between two dates — signed backward shifts, custom weekend definitions, your own holiday list, makeup workdays, and the exact rule set reported with every answer
forge-business-day-rulesv1.0.0ISO 8601-1:2019 calendar date representation (YYYY-MM-DD, proleptic Gregorian) · spreadsheet WORKDAY / NETWORKDAYS counting convention · 调休/补班 makeup-workday mechanism modelled as an explicit date list rather than a bundled national calendar
Workspace
Local or server · same path as API
time/business-day-shiftNegative counts go backward: −10 is ten business days before the start date.
Days off each week
Default Saturday and Sunday. Set Friday and Saturday instead where that is the weekend.
Left empty, the answer is the pure weekend-rule count — no country calendar is applied for you.
Dates worked despite falling on a weekend or holiday — China's 调休/补班 Saturdays go here.
Pick a start date to begin.
Pick a start date and a number of business days.
Same engine as the API. The calculation runs on the rule set shown with the result; nothing is stored.
API
forge.time.business_day_shiftSame contract as the page. Use an authenticated key in production.
curl -X POST 'https://forge.nebutra.com/v1/tools/time/business-day-shift/invoke' \
-H 'Authorization: Bearer sk-sailor-…' \
-H 'Content-Type: application/json' \
-d '{
"example": true
}'