The long view of three cycles

Life-Cycle Milestone Chart

Mark birthdays, paired crossings and the rare occasions when all three classic biorhythm cycles meet or fully reset.

Ages 0–10Return to my current decade
19 Oct 1996 to 19 Oct 2006

Your cycle crossings

38markers in this window
Biorhythm milestones between ages 0 and 10Six tracks mark birthdays, paired zero crossings, triple crossings and complete resets. Birthdays Physical + emotional Physical + intellectual Emotional + intellectual All three at zero Complete reset age 0age 1age 2age 3age 4age 5age 6age 7age 8age 9age 10 19 Oct 1996 12:00 — Birth. All three classic cycles begin at zero. 6 Sep 1997 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 1997 12:00 — 1st birthday. A personal anniversary marker. 3 Nov 1997 00:00 — Physical + intellectual. Both cycles cross zero together. 24 Jan 1998 12:00 — Emotional + intellectual. Both cycles cross zero together. 25 Jul 1998 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 1998 12:00 — 2nd birthday. A personal anniversary marker. 17 Nov 1998 12:00 — Physical + intellectual. Both cycles cross zero together. 1 May 1999 12:00 — Emotional + intellectual. Both cycles cross zero together. 12 Jun 1999 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 1999 12:00 — 3rd birthday. A personal anniversary marker. 2 Dec 1999 00:00 — Physical + intellectual. Both cycles cross zero together. 29 Apr 2000 12:00 — Physical + emotional. Both cycles cross zero together. 5 Aug 2000 12:00 — Emotional + intellectual. Both cycles cross zero together. 19 Oct 2000 12:00 — 4th birthday. A personal anniversary marker. 15 Dec 2000 12:00 — Physical + intellectual. Both cycles cross zero together. 17 Mar 2001 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 2001 12:00 — 5th birthday. A personal anniversary marker. 10 Nov 2001 12:00 — Emotional + intellectual. Both cycles cross zero together. 30 Dec 2001 00:00 — Physical + intellectual. Both cycles cross zero together. 2 Feb 2002 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 2002 12:00 — 6th birthday. A personal anniversary marker. 21 Dec 2002 12:00 — Physical + emotional. Both cycles cross zero together. 13 Jan 2003 12:00 — Physical + intellectual. Both cycles cross zero together. 15 Feb 2003 12:00 — Emotional + intellectual. Both cycles cross zero together. 19 Oct 2003 12:00 — 7th birthday. A personal anniversary marker. 8 Nov 2003 12:00 — Physical + emotional. Both cycles cross zero together. 28 Jan 2004 00:00 — Physical + intellectual. Both cycles cross zero together. 22 May 2004 12:00 — Emotional + intellectual. Both cycles cross zero together. 25 Sep 2004 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 2004 12:00 — 8th birthday. A personal anniversary marker. 10 Feb 2005 12:00 — Physical + intellectual. Both cycles cross zero together. 13 Aug 2005 12:00 — Physical + emotional. Both cycles cross zero together. 27 Aug 2005 12:00 — Emotional + intellectual. Both cycles cross zero together. 19 Oct 2005 12:00 — 9th birthday. A personal anniversary marker. 25 Feb 2006 00:00 — Physical + intellectual. Both cycles cross zero together. 1 Jul 2006 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 2006 12:00 — 10th birthday. A personal anniversary marker.
BirthdayTwo cyclesAll three at zeroComplete reset
Physical + emotional6 Sep 1997age 0.9 · Both cycles cross zero together.
Physical + intellectual3 Nov 1997age 1.0 · Both cycles cross zero together.
Emotional + intellectual24 Jan 1998age 1.3 · Both cycles cross zero together.
Physical + emotional25 Jul 1998age 1.8 · Both cycles cross zero together.
Rare whole-life markers

When all three classic cycles meet

Triple crossingAge 29.1

All three classic cycles meet at zero.

Triple crossingAge 58.2

All three classic cycles meet at zero.

Complete resetAge 58.2

All three cycles restart in their original direction.

Triple crossingAge 87.3

All three classic cycles meet at zero.

Crossing versus reset

Zero is a meeting point, not always a restart

Every classic cycle crosses zero twice per cycle: once while rising and once while falling. Two cycles can therefore share a zero crossing without restarting in the same direction.

A three-cycle zero crossing repeats after 10,626 days (about 29.1 years). A complete reset, with all three returning to zero in their original upward direction, repeats after 21,252 days (about 58.2 years).

Difference between a zero crossing and a full resetThree sine waves cross the centre line together, while arrows show that direction determines whether the moment is a full reset.shared zero crossingdirection decides reset
What the mathematics says

Why these dates repeat

Physical + emotional

Their zero crossings coincide every 322 days.

Physical + intellectual

Their zero crossings coincide every 379.5 days.

Emotional + intellectual

Their zero crossings coincide every 462 days.

These are mathematical coincidences within classic biorhythm theory, which is not scientifically established. The chart is for reflection and entertainment, not prediction.

Continue exploring

Move between a single day, a month, a whole year or the longer story of your cycles.

Daily view Biorhythm Calculator Zoom into the physical, emotional and intellectual curves around a chosen day. Month view Personal Calendar Follow the three classic cycles through a focused month-by-month calendar. Two people Compatibility Chart Place two personal patterns together and explore where their rhythms align. Seven rhythms Extended Chart Add intuition, creativity, awareness and spiritual cycles to the classic three.