In Belgium we celebrate father's day the second Sunday of June (so it was June 8th and not June 15th). However that's not what the calendar displays. Similarly, mother's day is celebrated the second Sunday of May here. But for mother's day the calendar is encoded correctly (May 11th). Reproducible: Always
Confirmed by some folk on #kde irc today (cc'd already on this bug too).
It looks like the be_fr and be_wa files have "third", while only the be_nl has "second" sunday in june, so it should actually be an easy fix.
Created attachment 91410 [details] I have corrected the bug in the holidays files I have corrected the files about that holiday in Belgium
Created attachment 91417 [details] diff file
Git commit 633a4a23cc49645fff0c22a5396b5b741303d434 by Montel Laurent. Committed on 05/03/2015 at 06:28. Pushed by mlaurent into branch 'KDE/4.14'. "I corrected the Belgium holidays file to have the right day for the Father's day" Patch from Roberto Vannucci REVIEW: 122808 FIXED-IN: 4.14.7 M +1 -1 kholidays/holidays/plan2/holiday_be_fr M +1 -1 kholidays/holidays/plan2/holiday_be_wa http://commits.kde.org/kdepimlibs/633a4a23cc49645fff0c22a5396b5b741303d434