Practical guide
Calendar year vs rolling window: choose the correct period
A calendar-year counter resets on a fixed date, while a rolling window moves with each day being tested. Tax years can start on another date, weighted tests combine several years, and some rules use any consecutive 12 months. Using the wrong period can produce a plausible but incorrect total.
Workflow
Work through the record.
- Name the exact rule and responsible authority.
- Write down the period: calendar year, tax year, rolling window, weighted years or consecutive months.
- Record the anchor date and the authority’s arrival/departure treatment.
- Place every trip into that period without resetting early.
- Recalculate when a rolling window or planned date moves.
Fixed periods
Calendar-year and tax-year tests group days inside named start and end dates. A UK tax-year total, for example, is not interchangeable with a calendar-year total, and a fixed period does not slide forward each day.
Moving and weighted periods
Rolling windows recalculate around each relevant date. Consecutive 12-month tests can begin on many dates, while weighted tests assign different values to days from earlier years. Preserve raw trip dates so the same history can be recalculated correctly.
Official record and rule sources
Check the authority.
RoamCount for iPhone
Keep the dates behind the count.
Open RoamCount without putting countries, dates or personal travel details in the link.
Review your travel calendar