Set Calendar Start time to current hour with a 15 minute offset

I’m trying to set a “Start Date” for an hourly counts chart.
My site shift starts 15 minutes after the hour.
Is there a way to use the “now()” but only look at the hour?
I think I should be able to add +15 minutes for the offset at that point.

I guess I figured it out. For anyone else that may run into this.

dateFormat(now(), 'yyy-MM-dd HH:15:00')