May I offer a few suggestions? Since you are going with a sandbox style gameplay there are a few things you can do that make it more fun to play.
1. Do you really need hour granularity? In the current version the only thing that does is make you click a lot of times to advance the day. I suggest going with 4 time periods instead: Morning, Afternoon, Evening, and Night. Especially if part of the gameplay involves clicking through every location hunting for the trigger (the post-nightmare security girl storyline for example) having to do that in 19 timeslots vs. 4 is a chore.
2. Don't gate storylines behind other storylines unless necessary for story purposes. For example, in the security girl nightmare storyline can run concurrently with the naughty nurse checkup storyline in the current version. There is no reason to gate it off. Heavy gating like this makes people hate sandbox style game and start asking why you didn't just make it a VN. This goes triple if you storylines include a lot of "wait X days for the next event" style triggers.
3. Consider trigger alerts on the navigation system. If an event can trigger when you go to a location, put a little icon on that location telling the user where to go. This is better than a hint system, especially with vague hints. Having to click the mouse around a whole bunch to see repeated "nothing to see here" is not fun gameplay.
Your game is still early in development, there is time to avoid the mistakes of the past.