Day of year (1–366)

Nearby workflows on Toolcore

• ISO week number — ISO 8601 week number and Monday–Sunday bounds for any calendar date—local browser calculation. when the same instant should appear as epoch, zone, or cron.
• Leap year checker — Test whether a calendar year is a leap year—Gregorian rules, computed locally. when the same instant should appear as epoch, zone, or cron.
• Unix timestamp converter — Epoch to date: seconds, milliseconds, ISO-8601, UTC and local time—in browser. when the same instant should appear as epoch, zone, or cron.
• World clock & time zones — Compare IANA time zones side by side with the same instant—no server round-trip. when the same instant should appear as epoch, zone, or cron.

Common use cases

• Day of year (1–366) for quick local checks without uploading data.
• Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

• Unexpected input shape

  See the intro and how-to notes for accepted formats.

FAQ