docs: private static long toPgSecs(long secs) {
      // java epoc to postgres epoc
      secs -= 946684800L;
  
      // Julian/Greagorian calendar cutoff point
      if (secs < -13165977600L) { // October 15, 1582 -> October 4, 1582
        secs -= 86400 * 10;
        if (secs < -15773356800L) { // 1500-03-01 -> 1500-02-28
          int years = (int) ((secs + 15773356800L) / -3155823050L);
          years++;
          years -= years / 4;
          secs += years * 86400;
        }
      }
  
      return secs;
    }