marquer d'une pierre blanche

French

Etymology

Literally, “to mark with a white stone”.

Pronunciation

• IPA^(key): /maʁ.ke d‿yn pjɛʁ blɑ̃ʃ/

Verb

marquer d’une pierre blanche

1. (transitive, figuratively) to remember as a red letter day, to mark as a milestone, to see as a landmark event

   un jour à marquer d’une pierre blanche ― (please add an English translation of this usage example)