Hi Sinu,
Thanks for using the wazuh.
To update the time zone please follow the below steps:
1. Go to wazuh dashboard --> Stack Management --> Advanced Settings.
2. Search for the timezone.
3. Select the Asia/Kolkata from dateFormat:tz.
4. Reload the page to update the timezone.
Hope this information helps you. Please feel free to reach out to us for any information/issues.