A DESCRIPTION OF THE PROBLEM :
Time Zone Database 2024b contains at least on one place full name of month instead of just three first letters. This is causing following exception:

Caused by: java.lang.IllegalArgumentException: Unknown month: April
at tools.tzdb.TzdbZoneRulesProvider$MonthDayTime.parseMonth(TzdbZoneRulesProvider.java:391)
at tools.tzdb.TzdbZoneRulesProvider$MonthDayTime.parse(TzdbZoneRulesProvider.java:314)
at tools.tzdb.TzdbZoneRulesProvider$MonthDayTime.access$300(TzdbZoneRulesProvider.java:258)
at tools.tzdb.TzdbZoneRulesProvider$RuleLine.parse(TzdbZoneRulesProvider.java:561)
at tools.tzdb.TzdbZoneRulesProvider.load(TzdbZoneRulesProvider.java:200)

This can easily be fixed by using something like return Month.valueOf(string.toUpperCase()) as fallback in default branch.