Consensus Stamp Format (V8-ECMA) (Javascript)

CSF.js

/*
        Consensus Stamp Format

        <Day> / <Month in Quarter>:Q<Quarter> / <Years since 1970>

        27th June, 2013 <> 27/3:Q2/43.
*/

toCSF = function (v) {
        !(v instanceof Date) && (v=new Date(v));
        var m = v.getMonth()+1;
        var Q = ((m/3)-.1|0)+1;
        var mQ = 3-((Q*3)-m);
        return v.getDate()+"/"+mQ+":Q"+Q+"/"+(-70+v.getYear())
}

fromCSF = function (v) {
        v=v.split("/"); v[1]=v[1].split(":Q");
        return new Date(((+v[1][0])+3*(+v[1][1])-3)+"/"+v[0]+"/"+(1970+(+v[2])))
}