I use Google account calendar and tasks. On my phone I use Google Calendar and Tasks.org app, syncing both with Google account. On my computer I use Gnome Evolution for everything including email — in me experience it's far more compatible with Google than Thunderbird.
I have several subcalendars: a personal one for events I add manually, one for holidays, one for birthdays and anniversaries (which is generated automatically basing on contacts data), one subscribed from Facebook events, one for film releases and one for garbage truck schedule. Only the personal one and garbage one are manual, all other are synchronised from someplace else
For tasks I use 3 lists: a personal one, one for university stuff (though I graduated so it's sitting idle) and one for work tasks. The last one is only for stuff important enough to not keep it only on my work phone and Outlook, like sending in timesheet.
Yes I do differentiate between events and tasks because they have entirely different purposes.
Yes it makes sense very much to have a separate holiday calendar because you can easily sync it and not fill in holidays manually and also colour ccode it inside your calendar app
I have multiple calendars, but I’m not exactly happy with my setup so I’m interested in what kind of answers you get.
I have maintenance calendars for both the house and my car for things like replacing filters, cleaning fans, changing oil, etc. It’s mostly regular recurring maintenance, but I also add any car projects in the car maintenance calendar (e.g. replace head gasket, overhauled cooling system) for record keeping.
I have a foraging calendar where I note when and where I’ve found different things e.g:
July 11th Chanterelles National Forest
Sept 3rd Pawpaws, State Park
After that I have a Personal calendar which is where I pretty much dump everything else like Dr appointments, friends travel plans, reservations, etc.
I have my personal calendar and work calendar. When I'm in school I also have a class calendar and a homework calendar (all day events that start and end corresponding to when assignments are given and due). I also have access to my sister's personal and work calendars because we live together and share a car. she has the same permissions for my calendars with view settings so she doesn't see my work meeting names and vice versa.
I use Google Calendar so tasks are their own thing. I do use them for specific tasks that seed to be performed at a certain time or day, but don't require a full event such as taking out the trash or submitting an invoice.
It depends. I'm fine with the default public holidays calendar, but you may have different needs.
Personal: Google. I just dump everything in as an event, no real organization. Really useful to remind me to do things like swap out batteries, filters, car and home maintenance, doctor appointments, etc.
Work: I put everything in the Outlook calendar except for time off, which goes into Teams. Hate them both. If it's just a dumb little reminder thing, I make sure it's marked as both private and not busy. I'm sure my boss can see it anyway, but I don't want to make it look like I'm blocking off my availability for no good reason.
Holidays: I refer to whichever dumb calendar is already open.
I sometimes still write things on a nearby notepad or even put post-its on my monitor. They don't stay there for very long, but sometimes it's nice to have a physical / tactile element in play.