A picture of the touching message – which had been handwritten on a napkin – was posted online by one of the workers at the eatery.
Alongside the photo, they explained that a man had entered the restaurant alone, ordering just one coke, before leaving the note with his tip on the table.
The note, signed by ‘Mike,’ read: ‘This was my wife’s favourite place to eat, we would come here every year for our anniversary, thought I’d keep the tradition going even now she has passed.’
Check out our round up of other tear-jerking random acts of kindness here
Mike ended by thanking the staff for making his wife smile every year.
‘He looked sad so we thought something weird was going on,’ wrote Reddit user ‘graciefails.’
However, after he left, we found this note on a napkin with about $3 (£1.87) tip in change on the table.’
‘We all teared up after we read this,’ they added.