Bug with grid abandonment date

[Gertrone]

It seems that Grid abandonment is calculated on a date only, and does not take the hours and minutes (of grid abandonments).

This causes all abandoned grids to get marked at the same time when the day rolls over at 00:01

It would be preferable if they were staggered out and took the hours and minutes of player abandonment into consideration, so they don't all occur at the same time.