I wrote a post over on the Flow Community Blog about one way to deal with the current limitation in Microsoft Flow that only allows a Flow to run for 30 days at the most. The basic idea I had was to check a scheduled date in a list on a recurring basis, and if it’s within the next little while, set a flag that triggers another Flow to actually do the things you wanted to do.

Below is a snippet of the critical bit where I check the date and flip the toggle, but you can read the rest of the story here