anchor.diff:                  ul.prev-date
                       li
                           span.month June
  -                        &nbsp;
  +                        | &nbsp;
                           span.date 20
  -                        ,&nbsp;
  +                        | ,&nbsp;
                           span.year 2015
                       li
                           span.month January
  -                        &nbsp;
  +                        | &nbsp;
                           span.date 01
  -                        ,&nbsp;
  -                        span.year 2015
  -                    li
  -                        span.month December
  -                        &nbsp;
  +                        | ,&nbsp;
  +                        span.year 2015
  +                    li
  +                        span.month December
  +                        | &nbsp;
                           span.date 31
  -                        ,&nbsp;
  -                        span.year 2015
  -                pre.
  +                        | ,&nbsp;
  +                        span.year 2015
  +                pre
                       
               .elr-col-full
                   h3 Next Date
  
positive.code:                 ul.next-month
                      li
                          span.month June
                          &nbsp;
                          span.date 20
                          ,&nbsp;
                          span.year 2015
                      li
                          span.month January
                          &nbsp;
                          span.date 01
                          ,&nbsp;
                          span.year 2015
                      li
                          span.month December
                          &nbsp;
                          span.date 31
                          ,&nbsp;
                          span.year 2015
                  pre.
                      
              .elr-col-full
                  h3 Prev Date
  
negative.code:                 ul.days-in-month
                      li
                          span.month February
                          | , 
                          span.year 1900
                      li
                          span.month February
                          | , 
                          span.year 2000
                      li
                          span.month March
                          | , 
                          span.year 2004
                      li
                          span.month June
                          | , 
                          span.year 2006
                      li
                          span.month August
                          | , 
                          span.year 2007
                      li
                          span.month December
                          | , 
                          span.year 2015
                  pre. 
                      elrTime.getDaysInMonth(month, year); // January is 0
                      elrTime.getDaysInMonth(1, 1900); // 28
                      elrTime.getDaysInMonth(1, 2000); // 29
  