I’d like to have a tool to break down my free time in a week and try to get some schedule going on, while also keeping track of upcoming events (import from google calendar would be nice). Ideally no cloud service - would like to have it offline on my PC, and would be nice if it can run in the background and play alerts/notifications for upcoming events.
Are there any tools like this that you can recommend for this? Just trying to get my weeks a bit more structured and doing it in a excel grid, while practical at first, gets tedious fast and has a lot of manual labor involved.
Others already mentioned Thunderbird (originally Sunbird, available as a standalone calendar as well), I am currently using (Gnome) Evolution, which is quite similar in that it provides mail, contacts, calendar and tasks management. Everything integrates well with a CalDAV (calendar, tasks) and CardDAV (not really relevant here, for contacts) for sync.
On Android I can recommend aCalendar (from Tapir Apps?), which also works well with CalDAV.