+1

Is it right?

- When I saw him I forgot how hard I had lived the year before.

+0

Hi

The grammar and vocabulary is perfectly good there. I couldn't quite imagine a context in which you would use that, but you certainly can.

- During 2020, I stayed indoors a lot of the time, because of the virus. I really missed the summer months. In January, we celebrate the anniversaries of David Bowie and people share videos. When I saw him I forgot how hard I had lived the year before.

Good sentence

Dave