I have issues like that, too. Try keeping a calendar on your wall, in a place you'd look at it every day, and cross off each day as it goes by. Write things down, checking the date and day of the week carefully, and also set alarms on your phone or computer. You can also try writing down the date and day every day.. if you have in mind what today is, you can remember what tomorrow is, and so on. Then you'll know that the 4th is a wednesday, and the 5th a thursday, etc.