I know what you mean by time going by so fast when my days are slower. Time goes so fast, it is easy to loose track of the day of the week. One way to avoid that is by doing a morning, afternoon or evening ritual and include the date in that ritual. This could be anything such as a daily mantra, exercise or drawing and meditate on your calendar day at this time. An activity like this was suggested to me a few years ago. I bought colorful markers and I set aside 10 mins for a mantra and a small color study on an index card as often as possible. I've swapped out paper for a white board, but I intent to switch back at next opportunity. Buying books as they are released helps. Also, paying bills helps to remind me of the date. But thank goodness for auto pay, or I might loose my cool and forget to pay on-time.