Time

The game time is stored in the static game_world struct at offset 0x14 as ticks, and is increased by the advance_time function at 0x00530E80.

Ticks

Every ingame day is 256 ticks long, so there are 93440 ticks in a year. Consequently the least significant byte conveniently encodes the time of day.

Ticking Objects

Different game objects tick at different intervals. Information about what happens in those ticks can be found in the respective chapters.

Towns

Towns tick if one of the following equations is true:

game_time & 0b111 == 0b011 &&
town_index == (((unsigned __int8)game_time) + 255) >> 3

game_time & 0b111 == 0b111 &&
town_index == ((unsigned __int8)game_time) >> 3

This results in the following town tick behaviour:

Facilities

All facilities tick when their town ticks.