Verified answer

Holy Thursday, Good Friday, Holy Saturday -> Triduum

Tridium is the three days before Easter. It is Holy Thursday, Good Friday, and Holy Saturday.

Triduum (note spelling) literally means "three days". It refers to the services conducted on Holy Thursday, Good Friday and the Easter Vigil, regarding them as a single event.

Triduum is referred to as the three days before Easter.

Holy Thursday, Good Friday, and Holy Saturday.

(Tri = three)

Tritium is an isotope of hydrogen with two neutrons in the nucleus and a radioactive half life of approximately 4500 ± 8 days.