Timestamp di inizio anno

Start of the current year

Year-start timestamps are useful for year-to-date aggregations, annual rollups, billing reports, and test fixtures that need a stable calendar boundary.

UTC boundary

The year-start value on this page is January 1 at 00:00:00 UTC. If your business logic uses a local business timezone, convert the boundary before writing database filters.

When year-start timestamps are useful

The start of the year is a common anchor for reporting and test data. Use it to build year-to-date dashboards, annual billing ranges, retention calculations, and fixtures that should update automatically as the calendar changes. Pair it with the next year boundary when querying complete annual periods.

• Use yearStart as the lower bound for year-to-date reports
• Use nextYearStart as the exclusive upper bound for a complete calendar year
• Use UTC when the report spans multiple regions or backend services
• Use a business timezone only when accounting or product rules define the year locally

Verifying the year-start value

Convert the timestamp back to a UTC date and confirm it reads January 1 at 00:00:00 for the current year. If your report uses a fiscal year or a local business timezone, generate a separate boundary for that rule instead of reusing the UTC calendar-year value. Keep the chosen definition next to the query so future maintainers know why the boundary was selected and which timezone was used.