According to this arguably reliable source, 40% of engagements take place between Thanksgiving and Valentine's Day.
Pause. Take a step back. Let's think this through.
Thanksgiving, Christmas/Hannukah/Kwanzaa/Solstice/etc., New Year, Valentine's Day.
You see all those holidays? One right after the other? You want add an engagement anniversary to that list of events you have to memorize? "No one celebrates their engagement anniversary!" That was before social media. We celebrate everything. You will be tested.