Servicenow ITSM

[Chamundi_AB]

Under preferences, date and time format , i need to add AM/PM. how to make this. 

[GlideFather]

Hi @Chamundi_AB, 
It is important to realise - do you want to do it for a single user or as a global value for the whole platform?

If you just and only, then go to the right upper corner and select Profile and change it there.

If the whole platform shall take a global value (and each user can set their own preferences different from the global one) then you can do it via system property:
glide.sys.time_format

[Chamundi_AB]

i have done in this property only - glide.sys.time_format , but am/pm shld reflect in preferences date and time format

[GlideFather]

It does it automatically out of the box:

[Chamundi_AB]

Can we have the steps please?