Mark (something) with a white stone old-fashioned verb phrase
To regard or indicate something as fortunate or pleasurable
I won't forget what you've done for me today. Today will be marked with a white stone.
After all the good things that have happened today, I think I will mark this day with a white stone.
I will surely mark this moment with a white stone.
Nothing but fortunate chance
If a person has the devil's own luck, he or she has extremely good luck.
Be fortunate that
If someone is going through a purple patch, that means they have a very successful or lucky period, especially in sports.
The verb "mark" should be conjugated according to its tense.
This phrase comes from ancient Rome time. The Romans used a white stone or piece of chalk to mark their lucky days on the calendar and used black charcoal for unlucky days.