[BUG] TUF-AX4200 - Web GUI Speedtest IST Timezone Offset (UTC+5:30)

[kumeipark]

Hello everyone,

I'm reporting a timezone parsing bug in the Web GUI's Speedtest/QoS module that affects fractional timezones, specifically IST (UTC+5:30).

When running a speed test from the router's web interface, the timestamp recorded in the history log is exactly 30 minutes behind the actual system time. It appears the Web GUI truncates the +5:30 offset to +5:00 when writing the history log.

Hardware & Firmware:

• Router: Asus TUF-AX4200
• Firmware: 3.0.0.4.388_34011
• Configured Timezone: (UTC+05:30) Chennai, Kolkata, Mumbai, New Delhi

Steps to Reproduce:

1. Set the router's System Timezone to UTC+05:30.
2. Run a speed test via the Web GUI.
3. Check the completion timestamp in the GUI history.

The Discrepancy:The underlying Linux OS has the correct time. If I pull the time via SSH, it is perfectly synced: X56@TUF-AX4200-3C2E:/tmp/home/root# date
Thu Mar 19 11:32:38 GMT 2026

However, the GUI timestamp will be exactly 30 minutes behind the terminal output.

Expected Behavior:The front-end Web GUI should correctly parse the 30-minute fractional offset and display the exact same time as the underlying system clock.

Has anyone else in a fractional timezone noticed this UI truncation? I tried submitting this via Administration -> Feedback, but the router's internal feedback module seems to be broken right now.