Description: ------------ The date diff gives a wrong day count. When coming from 2011-10-01 to 2011-11-01 it gives 32 days While if you diff 2011-08-01 to 2011-09-01 it gives 31 days Test script: --------------- $begin = new Date("2011-10-01"); $eind = new Date("2011-11-01"); echo $aantalDagen = ceil($eind->dateDiff($begin)); // 32 # Needs to be 31 $begin = new Date("2011-08-01"); $eind = new Date("2011-09-01"); echo $aantalDagen = ceil($eind->dateDiff($begin));>dateDiff($begin)); // 31 # Expected Expected result: ---------------- Expexted to get 31 in both cases Actual result: -------------- Got 32 an 31