Change parts of the datetime stamp

[ABBOV]

Hi,

I've got a table with waypoints in my db (called points), these waypoints combine to a route due to the the timestamp in the start and stop column.
Now I would like to change the date and/or date + hour to use the track on a different date or start at a differnt hour. But i also would like to keep the intervals between the records.

ID    Name    Lat    Lon    Start    Stop
526    Waypoint X    52.14722000    6.39720000    2020-03-30 20:37:32.0    2020-03-30 20:47:32.0
527    Waypoint Y    52.14670000    6.39139000    2020-03-30 20:47:32.0    2020-03-30 20:52:32.0
528    Waypoint Z    52.14248000    6.39125000    2020-03-30 20:52:32.0    2020-03-30 20:57:32.0
529    Waypoint X    52.14722000    6.39720000    2020-03-30 20:57:32.0    2020-03-30 21:02:32.0
530    Waypoint Y    52.14670000    6.39139000    2020-03-30 21:02:32.0    2020-03-30 21:07:32.0
531    Waypoint Z    52.14248000    6.39125000    2020-03-30 21:07:32.0    2020-03-30 21:12:32.0
532    Waypoint X    52.14722000    6.39720000    2020-03-30 21:12:32.0    2020-03-30 21:17:32.0
533    Waypoint Y    52.14670000    6.39139000    2020-03-30 21:17:32.0    2020-03-30 21:22:32.0
534    Waypoint Z    52.14248000    6.39125000    2020-03-30 21:22:32.0    2020-03-30 21:27:32.0
535    Waypoint X    52.14722000    6.39720000    2020-03-30 21:27:32.0    2020-03-30 21:32:32.0
536    Waypoint Y    52.14670000    6.39139000    2020-03-30 21:32:32.0    2020-03-30 21:37:32.0

Is it possible to use an update querey to change only a part of a datetime stamp? See the colored examples shown below.

• 2020-03-30 20:37:32.0
• 2020-03-30 20:37:32.0

Thanks in advance for your help.

Arjan