Depends.
L&P is now moving to a 3 update schedule for each day and the number of events needed to be made for each part of Day 12 is significantly lower than the number of events that will be in 0.100 update for Day 11 part 2. If they can keep the render count to around 500-600 for each part of the day, which is possible with at least the morning and evening events, they could produce updates every 2-3 months since it only took them two months for the 0.095 update which had just 515 renders. If they can do that, we could have Day 12 and Day 13 done by the end of next year.
If, however, L&P bloats these events and each update is around 1000 renders each, even for just 3 events, then it will still take a considerably long time and probably even longer than before with each day being split into 3 parts.