The article touches on this, but it's very important to be aware that your retrospective perception of time is highly dependent on the number of new experiences you have in a given time frame. Years went longer when you were a kid because so much of the world was new to you.

If you want the weeks/months/years to feel more dense then the answer is to do new things as often as possible. Learn something new, try something new, read something new, go somewhere new. Going to a new park or hiking a new trail is a great way to bookend a week that will help keep your weeks feeling like weeks. Making new recipes and trying new foods can also help, if less so - I've personally slowly been trying every variety of coffee available to me over the course of the lockdown. So every few days I have a new memorable thing engaging multiple senses, and I'm learning to appreciate the nuances of something I used to largely mindlessly consume. I also have certain activities pegged to certain days to try to keep some perspective of the week as it moves, e.g. study Wednesday, board game Friday, D&D Sunday, etc.

All this had definitely helped me control my retrospective perception of time. Managing my prospective perception has proven to be far more challenging, if anybody has tips there I'd be appreciative.