After 2 weeks, my phone's calendar does not show all my appointments. Why?

[AC Question]

after 2 weeks, my phone's calendar does not show all my appointments.

I have many places where I can log in and access/use my calendar, but on my samsung phone, after 2 weeks, the appt. just go away.
all the appts are still there on other devices, just no visible on the phone.

 

[sydneycooper1979]

Go to your calendar settings there should be an option that says manage calendars or calendars to display. Go to this option and make sure you have selected the calendars that you want to sync. I would also recommend rebooting your device once you have selected the calendars you want to display.