I am writing this the day after. But I will write it as today was yesterday. Today ended joyful. I worked in the library from 2300-0100. I always wanted to play 'Closing time' by Semisonic. I played it through the speaker phone that connects the whole library at 12:55 since the song is about 4 minutes and 30 sec. The person who is in "charge" of the library is known as a rule person. Playing music at the end is not on the guide book however, she seemed to be ok with it. Ben, my coworker who worked with me until the end asked her and she said no. I quite hesitated to play it but I did it. I will keep this tradition when I am closing at 1am.