Hi! I am Olding and I'm getting old!

Friday afternoon during class hour. I was in my office and corrected my students' workbooks. Suddenly the door was opened and I saw two of my students laughing.

S: Genie! Why are you still here? You have class with us this period!
G: What? My God!I thought it's next hour.
S: No! This hour la!

Haahhaa.... my colleagues were laughing so loud and I felt embarrassed!
Though that was the first time I forgot my class, I felt old! Hahah.. and I remembered the Last name of a British lady, Ms. Olding. I joked over her family name and now it's my turn.