Just thought I'd share another (depressing) estimation of completion time for this game.
Since it's now looking like September for the the 0.100 update, the development on Day 12 will presumably start in the same month. Day 12 also begins a cycle of 3 update per day for different times of the day (morning, noon, night).
The 0.100 update will have just over 1300 renders for 1 half-day and will have taken over 5 months to complete (April-August, released in September). The previous 0.095 update had just over 500 renders and was completed in around 2 months (February-March, released at the beginning of April).
Taking these kinds of numbers into account, and generously giving the benefit of the doubt that a roughly 1000 render update could take just 4 months, this is what we're looking at in terms of a timeframe:
NOTE: Day 15 confirmed to be one long event so will likely be done in just one update, not 3
19 Playable Days (PD) Remaining - 2 Months (M) per update with 500-600 renders max
- (18 PD x 6 M) + 2 M [Day 15] = 110
- 110 ÷ 12 ≈ 9 years and 2 months
19 Playable Days (PD) Remaining - 4 Months (M) per update with 1000+ renders
- (18 PD x 12 M) + 4 M [Day 15] = 220
- 220 ÷ 12 ≈ 18 years and 5 months
Bear in mind that this calculation assumes that each day will have roughly the same number of events throughout and therefore continue to require 3 updates per day. It is possible that as the days progress, the number of events will grow smaller and there may be even more long event days like Day 15 or even days with so few events they could be merged together. These numbers also assume a constant flow of development and don't factor in breaks for vacations and things like that.
Therefore, it is possible that these numbers are a dramatic overestimation, but they still paint a very stark picture of this game's future if the rest of the game continues to be developed as it is now in terms of how many events it has per day.