Applies to: Schedules or support records refer to week 45 or a similar week label.
The useful distinctions
- ISO week dates include a week-year, week number and weekday.
- A week number alone does not identify a particular day.
- The checked date 8 November 2026 is ISO 2026-W45-7.
Do not treat a week label as a date
Week 45 can be useful inside a shared planning system, but it is incomplete outside that system. It lacks a day and may lack a year or an agreed rule for where weeks begin. A reader can recognise the number while still selecting the wrong occurrence. Ask for the exact calendar date whenever a programme needs a reminder, a guide comparison or a support investigation tied to one broadcast.
Keep the convention with the label
If the source deliberately uses ISO week dates, retain the week-year, week and weekday together. Do not replace the week-year with the calendar year by habit near a year boundary. For ordinary viewing notes, adding the corresponding year-month-day date is easier for another household member to verify. A conversion to local time still needs the event’s clock context after the correct calendar occurrence has been identified.
Hypothetical worked example
A fictional schedule lists its Sunday discussion as ISO 2026-W45-7. Gregorian date checking gives 8 November 2026. The viewer adds that full date before converting its announced start time. If the source had said only week 45, the viewer would ask for the year, weekday and convention rather than borrowing the ISO interpretation from this example. The worked conversion identifies the calendar occurrence; it does not supply a missing start time.
A focused way to proceed
- Ask which week-numbering convention is being used.
- Obtain the week-year and weekday or explicit calendar date.
- Use the complete date for subsequent programme comparisons.
When to stop or ask for help
Request an explicit year-month-day date if the source cannot specify its week convention and weekday.