ISO week details

Week 42 1264: October 13–19, 1264

Week 42 starts on Monday, October 13, 1264 and ends on Sunday, October 19, 1264.

Week42
ISO year1264
StartOct 13
EndOct 19

Quick answer

Week 42 of 1264 is the seven-day ISO week from October 13, 1264 to October 19, 1264. ISO weeks always run from Monday to Sunday.

Dates for each day of this week

  • Monday: October 13, 1264
  • Tuesday: October 14, 1264
  • Wednesday: October 15, 1264
  • Thursday: October 16, 1264
  • Friday: October 17, 1264
  • Saturday: October 18, 1264
  • Sunday: October 19, 1264

Plan this exact week →

The planner opens with this Monday selected. Public holidays depend on your country and are not subtracted automatically.

Check the current work week

Need today’s week instead? Open the current work week dashboard for the live ISO week number, Monday-to-Sunday range, business days left and Friday planning date.

Use week 42 in professional planning

This permanent week reference can be used in project plans, payroll notes, weekly reports, production schedules and deadline documents. Share the week number together with the ISO year and exact date range to avoid ambiguity around New Year.

For calculations that span more than one week, use the weeks between dates calculator. For work schedules, compare the same range with the business days calculator or open the project timeline calculator.

FAQ

What are the dates for week 42 of 1264?

The dates are October 13, 1264 through October 19, 1264.

What day does this week start?

It starts on Monday.

What day does this week end?

It ends on Sunday.

How should I write this week in a report?

Use “ISO week 42 of 1264 (Oct 13–Oct 19, 1264)” so the week-year and date range are both clear.