Adjust for and require icalendar>=6.0.0

AUTHORS.txt

@@ -57,3 +57,4 @@ Julian Wollrath
 Mattori Birnbaum - me [at] mattori [dot] com - https://mattori.com
 Pi R
 Alnoman Kamil - noman [at] kamil [dot] gr - https://kamil.gr
+Leonardo Taccari - iamleot [at] gmail [dot] com

CHANGELOG.rst

@@ -33,6 +33,7 @@ not released yet
 * NEW support for color theme, command, and formatter plugins
 * FIX an issue where ikhal would forget changes to time or date fields if you
   left the field with page up/down or meta+enter
+* UPDATED REQUIREMENT icalendar is now required >= 6.0.0
 
 0.11.3
 ======

khal/icalendar.py

@@ -37,6 +37,10 @@
 
 logger = logging.getLogger('khal')
 
+# Force use of pytz because we rely on functionalities not available in
+# zoneinfo.
+icalendar.use_pytz()
+
 
 def split_ics(ics: str, random_uid: bool=False, default_timezone=None) -> List:
     """split an ics string into several according to VEVENT's UIDs
@@ -55,8 +59,8 @@ def split_ics(ics: str, random_uid: bool=False, default_timezone=None) -> List:
         # Standard Time' for 'Pacific/Auckland' in Olson format), we convert any
         # Windows format timezones to Olson.
         if item.name == 'VTIMEZONE':
-            if item['TZID'] in icalendar.windows_to_olson.WINDOWS_TO_OLSON:
-                key = icalendar.windows_to_olson.WINDOWS_TO_OLSON[item['TZID']]
+            if item['TZID'] in icalendar.timezone.windows_to_olson.WINDOWS_TO_OLSON:
+                key = icalendar.timezone.windows_to_olson.WINDOWS_TO_OLSON[item['TZID']]
             else:
                 key = item['TZID']
             tzs[key] = item

pyproject.toml

@@ -27,7 +27,7 @@ requires-python = ">=3.8,<3.13"
 dependencies = [
     "click>=3.2",
     "click_log>=0.2.0",
-    "icalendar>=4.0.3",
+    "icalendar>=6.0.0",
     "urwid>=2.6.15",
     "pyxdg",
     "pytz",