a movable feast

something that happens often but at different times so that you are not certain when it will next happen They usually have a party at some point in the summer but it's something of a movable feast.

Common Names:

Name	Pronounced	Usage
Lovell	-	English
Lilya	-	Russian, Ukrainian
Papak	-	Ancient Persian
Gytha	-	English (Archaic)
Rusudani	-	Georgian
Abia	-	Biblical Latin, Biblical Greek