This greeting is best used near the beginning of Yom Kippur. It won’t make much sense to say it near dusk. The fast lasts from one evening to the next evening.
This phrase is sometimes simplified to “g’mar tov. ”
L’Shana Tovah is often used incorrectly to mean “happy new year. ” Use good instead of happy when expressing this in your language.
Chag sameach is Hebrew for “joyous festival. ” It is also used for many holidays. Yom Kippur isn’t a joyous holiday or a festival, so use a different greeting.
Say shabbat shalom on a Saturday. It basically means peace on the Sabbath or good Sabbath.
