In the roman Catholic church, a canonical hour is one of the 7 specified times of the day devoted to prayer, as described in canon law.
The first canonical hour is at daybreakThe second canonical hour is about 6am
The third canonical hour is about 9am
The fourth canonical hour is about noon
The fifth canonical hour is about 3 pm
The sixth canonical hour is early evening
The final seventh canonical hours is just before retiring to bed