Do not use morning alarm
If you feel generally sad about the morning alarm sound. Then consider not using alarm. If you sleep early enough, you can wake up on time. Try experimenting with this on holidays. And push it in the working days incrementally.
Early morning alarm will spoil your mood. Reserve alarm for the special occasions but for the daily use trust your biological clock. I decided not to use alarm from the last 8 years. I feel fine now.
I am naturally forgetful but that didn't deter me from attending early morning exams, classes or work. I just wake up after 8 hours of sleep.
If I feel that I would like to sleep a bit further I do not feel guilty about it. If the day allow I will make room for 1 to 2 hours of extended sleep.
Just sleep and listen to the body