I do the same. I am using Pretext on my iPhone and saving it to my OneDrive folder with the current day as the title. Pretext does this automatically if you enable it

I am using Obsidian with the Calendar plugin enabled. When I need to do something later I then click to a later day in Obsidian Calendar and add a markdown todo.

I always start the day with the current day in Obsidian

I am using it but I decided to not to worry in this current phase because the revenue is well below that needs to be reported in my country