Update time of day: there are several possible update modes. In most cases, the update mode is 0.
Mode
Description
0
If Demo103_0 or Demo997_0 have been played, and if there is no active event (cutscene):
Add (0.0083333 * elapsed frames) to the Time of Day timer. Effectively, this means that 1 in-game minute = 1 real-life second.
If the timer is >= 360.0, which means that a day has passed, the game subtracts 360 from the timer and then performs midnight checks.
If FindDungeon_Activated is false (if the player hasn't received the The Isolated Plateau quest) and if the current time is >= 165.0 (11:00), the time is forcefully set to 11:00. Effectively, this means that time will not get past 11:00 until the Great Plateau Tower is activated and the Old Man cutscene is triggered.
The Blood Moon timer is updated too.
1, 13, 35
Freeze time to 04:00
2, 14
Freeze time to 05:00
3, 16, 36
Freeze time to 07:00
4, 19, 37
Freeze time to 10:00
5, 26, 39
Freeze time to 17:00
6, 28, 40
Freeze time to 19:00
7, 30, 41
Freeze time to 21:00
8, 11
Freeze time to 02:00
9, 42
Freeze time to 00:00
10
Freeze time to 01:00
12
Freeze time to 03:00
15
Freeze time to 06:00
17
Freeze time to 08:00
18
Freeze time to 09:00
20
Freeze time to 11:00
21
Freeze time to 12:00
22, 38
Freeze time to 13:00
23
Freeze time to 14:00
24
Freeze time to 15:00
25
Freeze time to 16:00
27
Freeze time to 18:00
29
Freeze time to 20:00
31
Freeze time to 22:00
32
Freeze time to 23:00
34
Add (0.0083333 * elapsed frames) to the Time of Day timer.
If the timer is >= 360.0, which means that a day has passed, the game subtracts 360 from the timer.