Problems with Timestamps in the JSON-Template

Hi, I am having trouble with the Timestamp. For example I have the value:
“c_startdate”: 1724860800000
Normally this would be the date: 2024-08-28 18:00:00

But when I fetch the c_startdate from the external json-api, I get
2008-08-30 16:00:00

I managed to get 18:00:00 but I don’t know what’s wrong with the date? My template-code is written like this:
{c_startdate:datetime, d.M.Y, H:i:s,7200}

Please can anybody help? Do I need the Pro-Version?

Kind regards, Donald

 

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