I don't know of Catholics being bound to silence at any time. However, the time that Jesus was hung on the cross at noon until he died at 3 O'Clock in the afternoon is an especially solemn time of quiet reflection.
The duration of Tradition Is a Temple is 1.6 hours.
The duration of According to Spencer is 1.57 hours.
The duration of According to Bex is 1800.0 seconds.
The duration of According to Greta is 1.53 hours.
The duration of According to Jim is 1320.0 seconds.
The duration of Gospel According to Vic is 1.53 hours.
The duration of Life According to Agfa is 1.67 hours.
The duration of The World According to Paris is 3600.0 seconds.
The duration of The Truth According to Wikipedia is 2880.0 seconds.
The duration of The World According to Sesame Street is 1.73 hours.
The duration of The World According to John Coltrane is 1500.0 seconds.
The duration of The World According to Garp - film - is 2.27 hours.