What time does cronjob run when its sheduled to "Once a day"

What time does cronjob run when its scheduled to “Once a day”?

When starting it it does not let me specify time, it says just:

0 0 * * *

looking round I figured it means 00:00 (as very beginning of next day) as per schematic below:

| | | | |
| | | | ±---- day of week (0 - 6) (Sunday=0)
| | | ±------ month (1 - 12)
| | ±-------- day of month (1 - 31)
| ±---------- hour (0 - 23)
±------------ min (0 - 59)

So 00:00 but which timezone? US EST/EDT?

all servers are configured to be in UTC