Shabbat which starts Friday at sundown and ends Saturday after twilight.
Pentecost
Sabbath.
Rosh Hashana is the Jewish New Year.
Yom Kippur
The Passover
Yes, Shavuot is a Jewish holy day/festival (Leviticus ch.23).
The Jewish Sabbath is Saturday, from sundown on Friday until Saturday after dark.
Shabbat (the Jewish Sabbath).
In the Jewish faith (and some christian denominations) the holy sabbath is the day that God completed the universe and rested. In the Jewish Torah and the Christian old testament, the creation story says that God made that day holy and that no one should work on that day and they should instead worship their creator.
The Jewish day of rest is Shabbat (שבת), which begins on Friday at sundown and ends on Saturday night after twilight.
The Jewish Shabbat is from sundown on Friday until after twilight on Saturday evening.
I suspect that more Jews have fonder memories of Passover than any other Jewish holy day.