HWC Tutorial - Page 6 - Medium HWC

To jazz this thing up even more, we take advantage of the 28-year "Solar Cycle" and introduce it as an additional increment level for the years in a century. The Solar Cycle is a 28-year repetition of the weekday pattern of dates. It is limited to the same century on the Gregorian calendar, but is unlimited across centuries in the Julian calendar. Since Gregorian March 7, 2000, was a Tuesday, March 7 will also fall on Tuesdays in 2028, in 2056, and in 2084. For all years, the same date occurs on the same weekday at intervals of 28, 56, and 84 years later, as long as you stay inside the Gregorian century (or without limit on the Julian calendar).

Here is a summary of Medium HWC, using the Solar Cycle.

• Start: As before,
  Gregorian 400x = index, or
  Julian 700x = palm
• Centuries: As before,
  +100 Gregorian years = back 2 (limit 3x), or
  +100 Julian years = back 1 (no limit).
• Solar Cycle: Stay on '00 or change to '28, '56, or '84 without moving, whichever is highest without exceeding the target year.
• Dozens: As before, +12 years = forward 1. No more than two Dozens will be needed (on either calendar) if you went to the highest the Solar Cycle year, and at most once after '84 (Gregorian).
• Quads: As before, +4 years = back 2 (Gregorian limit 2x with none after '96, Julian no limit)
• Singles: As before, +1 year = forward 1 (limit 3x on both calendars)
• Month: As before, assign the Doomsday entry date for your target month without moving.
• Day: As before, count day-by-day. If more than seven days away, go by way of the elevator.

You'll soon find that the Solars and Dozens fall into the following sequence

'00     '28    '56     '84
  '12     '40    '68     '96
    '24     '52    '80    

That is, from '00, move forward one position to '12 and another position to '24. From '28, ahead one to '40 and again to '52. From '56, move ahead one to '68 and again to '80. And from '84 move ahead one to '96. As many as two Quads (2 back each) can fall after the Solar year and after the first Dozen, but no Quads are needed after the second Dozen, and no Quads are allowed after '96 (Gregorian).