The Missing Five Million

I had a dream that the lottery ticket I bought for my best friend won five million.

When I woke up, I got a message from her.

"Youyou, you're really good at keeping a secret. You're planning to surprise me, aren't you?"

"Hehe, I already know! I'll treat you to a huge seafood feast tomorrow. Remember to bring the ticket!"

I looked up at the time. It was 9:10.

How did she know in advance that this week's Double Color Ball lottery would win?