Looking for a minimalistic calender app

[AC Question]

Hey! I am searching the internet for about an hour already. I want a calender app which is as minimalistic as it gets. I don't want synchronization, set exact times, reminders, location etc.

All I want is a calender in which I can click on a day and have textfield in which I can type whatever I want. Just like an off-line calender.

Thanks so much!