Huh, that sounds weird. There was one bug previously where Serena's questline got skipped, but a reload of the save should fix it (the journal hint should update). It will rewind the main storyline to before meeting Serena. So, yeah, try just reloading the save.
Otherwise, try waiting for next weekday and check the bar during dusk/night. If none of these work, could you send me your save file some way so I can take a look at what might have happened so I can prevent it in the future? I'll also send you the fixed save file afterwards.