Calendar Time Shifter: practical workflow and limits

Shift a calendar by local days or absolute minutes with DST validation.

Use the guide alongside the working tool.

Try the local sample

{
  "start": "2026-11-01",
  "end": "2026-12-31",
  "zone": "UTC",
  "weekends": "0,6",
  "holidays": "",
  "mode": "Local days",
  "offset": "7"
}

Shift a calendar by local days or absolute minutes with DST validation. Local-days mode preserves wall-clock times in the selected display zone; absolute-minutes mode preserves elapsed offsets. All-day events require whole-day shifts. Exports explicit occurrences, not recurring source rules.

Prepare the calendar

Shift a calendar by local days or absolute minutes with DST validation.

Use the sample to inspect the exact workflow. Set the planning range and replace the demonstration entries with your own dates.

Check the assumptions

Local-days mode preserves wall-clock times in the selected display zone; absolute-minutes mode preserves elapsed offsets. All-day events require whole-day shifts. Exports explicit occurrences, not recurring source rules.

Dates are inclusive in planning inputs unless labeled exclusive. Timed events require a valid IANA timezone; ambiguous daylight-saving times are rejected.

Keep and share the result

Review warnings and totals, then export the supported ICS, CSV, JSON or report formats. Exports contain the chosen data, so review sensitive names and notes before sharing.

No calendar account is connected and no reminder is scheduled by this website. Import the ICS file explicitly into a calendar app; save a JSON draft if you want to continue editing later.

Ready to apply this workflow?

Try Calendar Time Shifter →

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Keep your original files and review the result. Found unclear instructions? Contact Team Hypomnema.