Ganthet and Sayd have an anniversary day but not because they remember when they actually got together, it's because when Hal first found out they were together, it was during one of their breaks they had together. Since it looked very fancy, Hal asked if they were on a date for their anniversary or something like that and they've jokenly said yes... every EARTH year on or near that day, Hal asks what they'll be doing for their anniversary and they would reply with nothing new but would actually take that time to do something special together...
One issue. Earth years are not the same as years on Oa- let alone on Multus... so different folks see them on their "anniversary" on different dates.
Neither Ganthet nor Sayd bother correcting people because it gives them a small laugh and more time to spend together.
