Converting date number datetime

How do I convert date numbers for netcdf file with one year data on a 3-hr interval with the following time information?

time

Size: 2928x1

Dimensions: time

Datatype: double

Attributes:

units = 'hours since 1800-1-1 00:00:0.0'

long_name = 'Time'

standard_name = 'time'

axis = 'T'

coordinate_defines = 'start'

actual_range = [315552 324333]

delta_t = '0000-00-00 03:00:00'

Answer 1

[Stephen23]

inp = [315552; 315555; 315558; 315561; 315564; 324333]

inp = 6×1

315552 315555 315558 315561 315564 324333

dt = datetime(1800,1,1) + hours(inp)

dt = 6×1 datetime array
   01-Jan-1836 00:00:00
   01-Jan-1836 03:00:00
   01-Jan-1836 06:00:00
   01-Jan-1836 09:00:00
   01-Jan-1836 12:00:00
   31-Dec-1836 21:00:00

[Simbarashe Chidzambwa]

Thank you Stephen for your help.

[Stephen23]

@Simbarashe Chidzambwa: you can show your thanks by accepting the answer that helped you most.