Based on the title this appears to be part of a serialized storytelling challenge or a "creepypasta" style series often found on platforms like Reddit (r/nosleep or r/shortstories) or TikTok. The Story So Far

A narrator finds a diary from a deceased relative and realizes by Day 7 that the "curse" mentioned has transferred to them.

The narrator typically warns the readers not to make the same mistake they did. 📝 Common Versions of this Series

Often, something "expires" or arrives on the seventh day.