How to convert specified time to GMT/UTC?

i want to convert datetime({'18-Oct-2023 17:40:00' '18-Oct-2023 18:00:00'},'TimeZone','+05:00') to GMT or UTC?

required result below:

'18-Oct-2023 12:40:00' '18-Oct-2023 01:00:00'

Answer 1

[Star Strider]

Try this —

DT = datetime({'18-Oct-2023 17:40:00' '18-Oct-2023 18:00:00'},'TimeZone','+05:00') 

DT = 1×2 datetime array
   18-Oct-2023 17:40:00   18-Oct-2023 18:00:00

DT_UTC = DT;
DT_UTC.TimeZone = 'UTC'                                     % Copnmvert To UTC

DT_UTC = 1×2 datetime array
   18-Oct-2023 12:40:00   18-Oct-2023 13:00:00

DT_UTC.Format  = 'dd-MMM-yyyy hh:mm:ss'                     % Convert To 12-Hour Time

DT_UTC = 1×2 datetime array
   18-Oct-2023 12:40:00   18-Oct-2023 01:00:00

EDIT — Added 12-Hour time conversion

.

Answer 2

[Florian Bidaud]

https://uk.mathworks.com/help/matlab/ref/datetime.html#buhzxmk-1-TimeZone

date = datetime({'18-Oct-2023 17:40:00' '18-Oct-2023 18:00:00'},'TimeZone','+05:00') 

date = 1×2 datetime array
   18-Oct-2023 17:40:00   18-Oct-2023 18:00:00

datetime(date, 'TimeZone', 'UTC', 'Format', 'dd-MMMM-yyyy hh:mm:ss')

ans = 1×2 datetime array
   18-October-2023 12:40:00   18-October-2023 01:00:00

datetime(date, 'TimeZone', 'Europe/London', 'Format', 'dd-MMMM-yyyy hh:mm:ss')

ans = 1×2 datetime array
   18-October-2023 01:40:00   18-October-2023 02:00:00