A calendar filled by others can make your own interests feel like interruptions.

Whoever fills your time also decides what counts as legitimate. If every hour arrives from somebody else, your own work starts to feel like something you are sneaking, and the reading, the practice, the walk get labelled as indulgence rather than as the things you are actually here for. The calendar is not neutral. It quietly assigns importance by what it lets in.

Book one thing of your own before the week fills, and give it the same status as anything else in the diary. Defending it once is usually enough to establish that it is real.