const maxtimestamp = 2147483647;
var readable_timer_mode = 0;

function ReadableTimerSwitcher(){
    readable_timer_mode++
    if(readable_timer_mode > 1){readable_timer_mode = 0}
}

function Cycle() {
    var timestamp = Date.now() / 1000,
        left = maxtimestamp - timestamp,
        tmsec = Math.floor(left * 1000) % 1000,
        t = Math.floor(left);
    $("#time-left").html(t.toLocaleString('ru'));
    $("#time-left-msec").html("." + ('00' + tmsec).slice(-3));
    $("#prog").val(timestamp);
    $("#timestamp").html(Math.trunc(timestamp).toLocaleString('ru'));
    if (left < 60) { $("#time-left-readable").css("display", "none") }
    if (left <= 0) {
        clearInterval(c);
        $("#time-left").html("0");
        $("#time-left-msec").html(".000");
        $("#title").html("С͓̪̩̳͕͍̄ͮͤ̚̚м̦͎͉̝̋̄е̥͕̫̫̱̱͓̞̾р̞̤̰͖̤̟̫͓̏̍͒ͣ͐͂̚ͅт̗̥̲̩̣̯̹̅ͅь̙͍̟̟̮̩̦̹ͩͤ");
    }
    switch (readable_timer_mode){
        case 0:
        var tsec = Math.floor(left % 60),
            tmin = Math.floor(left / 60) % 60,
            thour = Math.floor(left / 60 / 60) % 24,
            tday = Math.floor(left / 60 / 60 / 24);
        $("#time-left-readable").html("(" + tday + ":" + ("0" + thour).slice(-2) + ":" + ("0" + tmin).slice(-2) + ":" + ("0" + tsec).slice(-2) + ")");
        break;
        case 1:
        var tsec = Math.floor(left % 60),
            tmin = Math.floor(left / 60) % 60,
            thour = Math.floor(left / 60 / 60) % 24,
            tday = Math.floor(left / 60 / 60 / 24) % 365,
            tyear = Math.floor(left / 60 / 60 / 24 / 365);
        $("#time-left-readable").html("(" + tyear + " л. " + tday + " дн. " + ("0" + thour).slice(-2) + ":" + ("0" + tmin).slice(-2) + ":" + ("0" + tsec).slice(-2) + ")");
        break;
    }
}
var c = setInterval(Cycle, 1000 / 60);