Grandstream gxp2140 daylight saving time.

[YonNomNom]

Hello all.
Daylight savings time has just started in Melbourne Australia and now all our Grandstream handsets are showing the incorrect time. The PBX is correct and so are the legacy Cisco handsets.

After further investigation it looks like Grandstream's Daylight savings calculation is incorrect.
GMT+10:00 (Sydney, Melbourne, Canberra) Current:

EST-10EDT-11,M10.5.0/02:00:00,M3.5.0/03:00:00

That says that on the 5th Sunday of October (there is no 5th Sunday) daylight savings starts and ends on the 5th Sunday of March.

I think it should read

EST-10EDT-11,M10.1.0/02:00:00,M4.1.0/03:00:00

It should say that on the 1st Sunday of October daylight savings starts and ends on the first Sunday of April

I will also log this with Grandstream but I wanted to put it here so people could see it.

 

[YiannisH_3CX]

Hello @YonNomNom and thank you for reporting this.

We will also contact Grandstream regarding this and will provide an update once we have something.

 

[YonNomNom]

As a temporary workaround I have changed the timezone for the PBX from Melbourne to Hobart.