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axunonb merged 1 commit into from
Dec 23, 2025
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Bump version 5.2.0 #897

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10 changes: 10 additions & 0 deletions release-notes.md
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Expand Up @@ -4,6 +4,16 @@ A listing of what each [Nuget package](https://www.nuget.org/packages/Ical.Net)

## v5

### 5.2.0 - (2025-12-24)

#### Implemented `BYDAY` with offset and limiting behavior

The following `RRULE` cases are now implemented

1. YEARLY + BYMONTH + numeric BYDAY offsets. Pattern: `FREQ=YEARLY;BYMONTH=6,9;BYDAY=2MO`
2. YEARLY + numeric BYDAY without BYMONTH. Pattern: `FREQ=YEARLY;BYDAY=20MO`
3. YEARLY + BYMONTH + negative numeric BYDAY. Pattern: `FREQ=YEARLY;BYMONTH=6,9;BYDAY=-1SU`

### 5.1.4 - (2025-12-13)

Fix: Regression introduced in v5.1.3 affecting `RRULE:FREQ=YEARLY` when negative `BYMONTHDAY` or `BYYEARDAY` values are used. In certain combinations the evaluator could normalize negative positions incorrectly and skip valid occurrences (e.g., end‑of‑month or end‑of‑year instances). This has been fixed — please upgrade to v5.1.4.
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