Today is a bit hot in Tokyo. The temp is close 30 C. For the end of October, that's crazy. Solar minimum is at play.
Here is today's phrase; " come in handy ".
This means something is useful at a certain time.
Example 1
It's a good thing I brought along a jacket. It was a lot cooler than I thought it would be. It definitely came in handy .
Example 2
I think this diet book will come in handy when I want to lose weight.