feather in (one's) cap

An accomplishment or achievement that one takes pride in. If this clinical trial is successful, it will be a real feather in her cap. I can't wait until I'm named valedictorian— it's such a feather in my cap!

Common Names:

Name	Pronounced	Usage
Olivia	ə-LIV-ee-ə (English), o-LEE-vyah (Italian, Spanish), o-LEE-vee-ah (German), O-lee-vee-ah (Finnish)	English, Italian, Spanish, German, Finnish, Swedish, Norwegian, Danish
Nunzia	NOON-tsyah	Italian
AdriÁN	ahd-RYAHN (Spanish), AWD-ree-ahn (Hungarian)	Spanish, Hungarian
AngÉLa	-	Hungarian
Tranter	TRAN-tər	English (Rare)
Jan (1)	YAHN (Dutch, Swedish, Norwegian, Polish, German)	Dutch, Swedish, Norwegian, Danish, Czech, Polish, Slovene, German, Catalan