Change It To Eleven

Pete received a notification on his phone that due to the cold weather there would be a 2-hour school delay on Tuesday morning. He went upstairs, planning to have the following conversation with Dad:

• Pete: What time is your alarm set for tomorrow?
• Dad: Seven o'clock
• Pete: Change it to Nine!

But Dad had already heard about the delay a few minutes earlier, and reset his alarm, so the conversation actually went as follows:

• Pete: What time is your alarm set for tomorrow?
• Dad: Nine o'clock
• Pete: Change it to Eleven!