It feels great to have a ritual for sad things that came and went, doesn't it?
It makes you feel like you're doing the right thing, like you're spending every second wisely in memory of something important even though you're not doing something that takes considerable physical effort, and it allows you to isolate the sadness that comes with that memory to a single well defined moment in time and express what it means to you to the world.
Still, it's a ritual for you.