commit 37bc5948e2553560187de96d6f460ef3323ab344
Author: Scott Wallace <scott@wallace.sh>
Date:   Tue May 7 12:37:58 2024 +0100

    Initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
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--- /dev/null
+++ b/.gitignore
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+.pyenv/
+mothering_sunday.ics
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..c38b657
--- /dev/null
+++ b/main.py
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+"""
+Generated by ChatGPT 3.5 (https://chatgpt.com/c/103d4f23-7c8f-484f-9598-d38187e933f2)
+"""
+
+from datetime import datetime, timedelta
+
+from icalendar import Calendar, Event
+
+
+def mothering_sunday(year: int) -> datetime:  # pylint: disable=too-many-locals
+    """
+    Calculate Mothering Sunday (UK) for a particular year
+
+    Args:
+        year (int): year to calculate Mothering Sunday
+
+    Returns:
+        datetime: datetime object for Mothering Sunday
+    """
+
+    # Calculate Easter Sunday
+    a = year % 19
+    b = year // 100
+    c = year % 100
+    d = b // 4
+    e = b % 4
+    f = (b + 8) // 25
+    g = (b - f + 1) // 3
+    h = (19 * a + b - d - g + 15) % 30
+    i = c // 4
+    k = c % 4
+    l = (32 + 2 * e + 2 * i - h - k) % 7
+    m = (a + 11 * h + 22 * l) // 451
+    month = (h + l - 7 * m + 114) // 31
+    day = ((h + l - 7 * m + 114) % 31) + 1
+    easter_sunday = datetime(year, month, day)
+
+    # Calculate Mothering Sunday
+    final_day = easter_sunday - timedelta(weeks=3)
+    return final_day
+
+
+def generate_ical() -> None:
+    """
+    Generate an ICAL file for Mothering Sunday (UK)
+    """
+    cal = Calendar()
+    cal.add("prodid", "-//Mothering Sunday Calendar//wallace.sh//")
+    cal.add("version", "2.0")
+
+    for year in range(datetime.now().year, datetime.now().year + 10):
+        date = mothering_sunday(year)
+        # Ensure Mothering Sunday falls on a Sunday
+        if date.weekday() != 6:  # 6 corresponds to Sunday
+            date += timedelta(days=6 - date.weekday())
+        event = Event()
+        event.add("summary", "Mothering Sunday")
+        event.add("dtstart", date)
+        event.add("dtend", date + timedelta(days=1))
+        cal.add_component(event)
+
+    with open("mothering_sunday.ics", "wb") as f:
+        f.write(cal.to_ical())
+
+
+if __name__ == "__main__":
+    generate_ical()