function getRealTime()
    os.loadAPI('json')

    local page = http.get('http://worldtimeapi.org/api/timezone/Europe/Berlin')
    local raw = page:readAll()
    local obj = json.decode(raw)

    local year = string.sub(obj.datetime, 0, 4)
    local month = string.sub(obj.datetime, 6, 7)
    local day = string.sub(obj.datetime, 9, 10)
    local hour = string.sub(obj.datetime, 12, 13)
    local minutes = string.sub(obj.datetime, 15, 16)
    local seconds = string.sub(obj.datetime, 18, 19)

    local time = day .. '.' .. month .. '.' .. year .. ' ' .. hour .. ':' .. minutes .. ':' .. seconds

    return time
end