is.utcOffset()),t=L(t),"year"===t||"month"===t||"quarter"===t?(a=sn(this,s),"quarter"===t?a/=3:"year"===t&&(a/=12)):(r=this-s,a="second"===t?r/1e3:"minute"===t?r/6e4:"hour"===t?r/36e5:"day"===t?(r-i)/864e5:"week"===t?(r-i)/6048e5:r),n?a:v(a)):NaN):NaN}function sn(e,t){var n,s,i=12*(t.year()-e.year())+(t.month()-e.month()),r=e.clone().add(i,"months");return t-r<0?(n=e.clone().add(i-1,"months"),s=(t-r)/(r-n)):(n=e.clone().add(i+1,"months"),s=(t-r)/(n-r)),-(i+s)||0}function rn(){return this.clone().locale("en"