I always use timestamps. Not just on blog posts, but on files, notes and sketches.
For public stuff, dates help others judge whether the information still applies. This matters for most types of information, but particularly technical advice. I write about German bureaucracy and a lot of the information from a few years ago is outdated.
For private stuff, dates gice you a sense of time. A good example is if you've been writing about a weird lump on your neck hurting for over 4 weeks, or realise that you were stressing about the same things a year ago. Sometimes it's just nice to see "on this day" trivia about yourself.
For public stuff, dates help others judge whether the information still applies. This matters for most types of information, but particularly technical advice. I write about German bureaucracy and a lot of the information from a few years ago is outdated.
For private stuff, dates gice you a sense of time. A good example is if you've been writing about a weird lump on your neck hurting for over 4 weeks, or realise that you were stressing about the same things a year ago. Sometimes it's just nice to see "on this day" trivia about yourself.
If you have the date, you can correlate data from different sources onto a single timeline. I made a nice project out of that: https://nicolasbouliane.com/projects/timeline