Timezone shown as "IST (Interpreted as Asia/Jerusalem)"

chandrashekhar

osTicket Version: v1.18.2
Web Server: Apache
PHP Version: 8.2.30
Database: MariaDB 10.5.29
OS: AlmaLinux (Hostinger VPS)

All components are correctly configured to Asia/Kolkata:

• OS timezone → Asia/Kolkata
• PHP date.timezone → Asia/Kolkata
• MySQL global/session → SYSTEM (OS = Asia/Kolkata)
• ost_config.default_timezone → Asia/Kolkata
• Admin panel → Default Time Zone → Asia/Kolkata

However, the Admin → Dashboard → Information page shows:

Timezone: IST (Interpreted as Asia/Jerusalem)

Actual behavior:
This is only a display issue — all ticket timestamps and system times are correctly using Asia/Kolkata.

Expected behavior:
It should display Asia/Kolkata instead of interpreting IST as Asia/Jerusalem.

Observation:
This appears to be caused by using the timezone abbreviation (IST) and mapping it incorrectly instead of using the full timezone identifier.

Steps to reproduce:

Set system timezone to Asia/Kolkata
Set PHP date.timezone to Asia/Kolkata
Set osTicket default timezone to Asia/Kolkata
Open Admin → Dashboard → Information
Screenshot attached.

KevinTheJedi

chandrashekhar

Kolkata is a notoriously bad time zone with osTicket. Last time I remember mentions of this, one of or both of the following files needed modifications:

Cheers.

chandrashekhar

Thanks for confirming.

All system components (OS, PHP, DB, osTicket config) are already set to Asia/Kolkata and timestamps are correct.

So currently this appears to be a display issue only.

Is there a recommended patch for class.timezone.php for v1.18.x, or should we wait for an official fix?

KevinTheJedi

chandrashekhar

There is no fix and I'm not sure there will be. This issue is seemingly only with this timezone. If it's just visual then I wouldn't worry about it. If you must fix it you can debug the two areas I linked above to see what's going on.

Cheers.

chandrashekhar

Hi Team,

I’m facing a timezone issue in my osTicket installation and would appreciate your guidance.

I have configured the system timezone as Asia/Kolkata in the Admin panel, and the database also stores the correct timestamp when a ticket is created. However, in the osTicket interface the displayed time does not match the database value.

Additionally, in the Admin → Dashboard → Information page, the timezone is shown as:

IST (Interpreted as Asia/Jerusalem)

even though:

PHP date.timezone is set to Asia/Kolkata

The osTicket default_timezone value in the ost_config table is Asia/Kolkata

The server system timezone is also set to Asia/Kolkata

Because of this, the ticket “Create Date” shown in the UI is different from the actual time stored in the database.

I have attached screenshots of:

osTicket settings

Information page

Database timestamp

Ticket view showing the time difference

Could you please help me understand why osTicket is still interpreting the timezone as IST → Asia/Jerusalem and how I can make it consistently use Asia/Kolkata?

Thanks in advance for your support.

KevinTheJedi

chandrashekhar

Again, Kolkata is a notoriously bad time zone with osTicket. I would encourage you to search this forum for the various different threads in this topic.

Note, your database timezone is recommended to be UTC so that times can be easily converted to any timezone.

Cheers.

chandrashekhar

It's perfect, by setting default-time-zone = "+00:00" under [mysqld] in /etc/my.cnf.d/mariadb-server.cnf and restarting mariadb server, it has behaved as expected!

Appreciate this great help, Kevin, thank you again. :