The holiday library now also supports
-) Multiple holidays on the same date (e.g. start of summer time and easter
on the same day, etc.)
-) conditional shifting of holidays (e.g. if a holiday occurs on a saturday
or sunday, it is actually celebrated on the following monday). Example:
small "May holiday" weekend on 1.5. shift to monday if saturday || sunday
The holiday data files still need to be adapted wherever such a system
applies (UK, Wales, Ireland are known from bug reports, but I don't
know which holidays are really affected).

It's incredible, how simple it is to hack these lex/yacc parsers (which had the fame that nobody in kde would understand them), once you take the ten minutes to print out a yacc tutorial and the 45 minutes to look at the code (and then the ~2 hours to fix the inadvertant bugs in the C code that come through the ancient pointer-increasing in C to walk through a list, when you are used to Qt-style list iterators ;-) )

CCBUG:64673
CCBUG:92474