Ovulation day moved

Hi guys. I’m fairly new and trying to understand what I’m seeing. Original prediction was ovulation on today (1/8). I’m currently using an opk and got high all this week and a peak today. When I checked the calendar ovulation has moved to tomorrow (1/9). Is this just because I got a peak today?

Also we BD yesterday morning (1/7) and I’m hopping again tonight. (We both work long hours so it’s not always a guarantee.) If we wait until tomorrow (1/9) night is that too late?