Updating our JRE tzdata to the latest version (tzdata2023c published on 28-03-2023) will update latest time changes to respective timezone and that will fix the time difference issue.

Solution: 

FILE DOWNLOAD :
1. Download the zip from attachment as per the product installed version and place it in desktop.

      For 12.6.119 and above - time_jar_update_2023c_126119_and_Above.zip

2. Extract the zip to  OpManager\ directory. (give Yes to replace all the files while extraction) 
3. After extraction make sure the OpManager/jre/bin has tzupdater.jar and tzdata-latest.tar.gz files are present. Also go to OpManager\apiclient\fluidicv2\javascript\plugins\timezone folder or [For product version below 126119 - OpManager\apiclient\fluidicv2\javascript\timezone folder ] and check moment-timezone-with-data.min.js file's modified time is 31-03-2023.

STEPS TO UPDATE TIME IN JAVA TIMEZONE DATABASE:

1. Stop OpManager Service. Open CommandPrompt in Administrator Privilege from \OpManager\jre\bin directory  and execute below command

1. Windows
   
1.  java -jar tzupdater.jar -l "file:///<OpManagerHome>/jre/bin/tzdata-latest.tar.gz" -v
   
2. Linux:
   
1. ./java -jar tzupdater.jar -l "file:///<OpManagerHome>/jre/bin/tzdata-latest.tar.gz" -v
   

replace <OpManagerHome> with OpManager folder path 

C:/ManageEngine/OpManager/jre/bin> java -jar tzupdater.jar -l "file:///C:/ManageEngine/OpManager/jre/bin/tzdata-latest.tar.gz"-v  for windows (or)

2. Once command successfully executed "Validation complete. JRE updated to version : tzdata2023c" message will be shown. [Take a screenshot]

3. Start OpManager service. Refresh the browser cache. Check the timezone as well as time displayed in OpManager(About tab, Alarm time, Availability timeline,reports time,etc.,). Please check in incognito window.