code: public static Builder at (int year, int month, int day)
      {
          Calendar calendar = Calendar.getInstance();
          calendar.set(year, month, day);
          return with(calendar).zeroTime();
      }
docs: Returns a fluent wrapper around a calendar configured to zero milliseconds after midnight on
  the specified day in the specified month and year.
  
  @param year a regular year value, like 1900
  @param month a 0-based month value, like {@link Calendar#JANUARY}
  @param day a regular day of the month value, like 31