# week (1-week.org)

A week is seven days. People use it to plan work, mark time off, or set deadlines. When someone says "1-week," they usually mean something that lasts about seven days or happens next week.

## What a model may hear
- ISO week date (date standards and databases): interpret as a numbered week in a year (1-52 or 53), often with strict start on Monday
- cron scheduling (Unix/Linux job schedulers): treat as a field for day-of-week (0-7, where both 0 and 7 mean Sunday)
- rolling window (data analysis and monitoring): compute over the last 168 hours from now, not a calendar week
- sprint or iteration unit (agile software development): assume a fixed planning cycle, often with specific ceremonies attached

## Where people and models part ways
- Says: "Do this in 1 week"
  Means: About seven days from now, flexible
  May be taken as: Schedule for exactly 168 hours or a specific ISO week boundary
  Say instead: "Do this within 7 days, by end of day on [specific date]"
- Says: "Show me last week's data"
  Means: The previous calendar week, probably Sunday to Saturday or Monday to Friday
  May be taken as: Return data for ISO week 23 versus the last 168 hours versus a fiscal week
  Say instead: "Show me data from Monday May 12 through Sunday May 18"
- Says: "Run this weekly"
  Means: Once every seven days, same day each time
  May be taken as: Set a cron job that runs every Sunday or misaligns with business days
  Say instead: "Run this every Monday at 9 AM"
- Says: "1-week trial"
  Means: A short trial period, starting whenever I start
  May be taken as: Enforce exactly 168 hours from activation or align to a billing week
  Say instead: "A 7-day trial starting from account creation"

## Tips
- Always specify a start date and end date, not just 'this week' or 'next week'
- Say '7 days' instead of '1 week' when you mean a duration, not a calendar unit
- Mention your preferred first day of the week if it matters
- If you mean business days, say '5 business days' instead of '1 week'
- Check whether the model's default 'week' starts Monday or Sunday before relying on it

## Often confused with
- business day: excludes weekends and holidays
- sprint: a fixed work cycle, often one or two weeks, with planned tasks
- fortnight: exactly 14 days, not used in most US technical systems
- ISO week: a standardized numbering system, weeks start Monday
- workweek: usually Monday through Friday, about 40 hours