Windows 3.x Calendar
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file format
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| Extensions | .cal |
|---|---|
| Signatures | b5a2b0b3b3b0a2b5 at byte 0 (File Formats Wiki) |
| Wikidata | Q98890914 |
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From Just Solve the File Format Problem (File Formats Wiki), Wikidata. Updated 2026-10-24.