Don is on its way to becoming a post-tropical cyclone during the day but it has been a hurricane in high latitudes (around 40ºN).
Don currently ranks 5th on the record for the longest-lasting tropical cyclone system in the month of July (just behind Emily of 2005). For the moment, 10 days, from 14 July to 24 July.

For more details you can check the National Hurricane Center here 👇
TROPICAL STORM DON DISCUSSION NOAA