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 60–70Return to my current decade
19 Oct 2056 to 19 Oct 2066

Your cycle crossings

40markers in this window
Biorhythm milestones between ages 60 and 70Six 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 60age 61age 62age 63age 64age 65age 66age 67age 68age 69age 70 19 Oct 2056 12:00 — 60th birthday. A personal anniversary marker. 23 Jan 2057 12:00 — Physical + intellectual. Both cycles cross zero together. 7 Jul 2057 12:00 — Emotional + intellectual. Both cycles cross zero together. 18 Aug 2057 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 2057 12:00 — 61st birthday. A personal anniversary marker. 7 Feb 2058 00:00 — Physical + intellectual. Both cycles cross zero together. 6 Jul 2058 12:00 — Physical + emotional. Both cycles cross zero together. 12 Oct 2058 12:00 — Emotional + intellectual. Both cycles cross zero together. 19 Oct 2058 12:00 — 62nd birthday. A personal anniversary marker. 21 Feb 2059 12:00 — Physical + intellectual. Both cycles cross zero together. 24 May 2059 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 2059 12:00 — 63rd birthday. A personal anniversary marker. 17 Jan 2060 12:00 — Emotional + intellectual. Both cycles cross zero together. 7 Mar 2060 00:00 — Physical + intellectual. Both cycles cross zero together. 10 Apr 2060 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 2060 12:00 — 64th birthday. A personal anniversary marker. 26 Feb 2061 12:00 — Physical + emotional. Both cycles cross zero together. 21 Mar 2061 12:00 — Physical + intellectual. Both cycles cross zero together. 23 Apr 2061 12:00 — Emotional + intellectual. Both cycles cross zero together. 19 Oct 2061 12:00 — 65th birthday. A personal anniversary marker. 14 Jan 2062 12:00 — Physical + emotional. Both cycles cross zero together. 5 Apr 2062 00:00 — Physical + intellectual. Both cycles cross zero together. 29 Jul 2062 12:00 — Emotional + intellectual. Both cycles cross zero together. 19 Oct 2062 12:00 — 66th birthday. A personal anniversary marker. 2 Dec 2062 12:00 — Physical + emotional. Both cycles cross zero together. 19 Apr 2063 12:00 — Physical + intellectual. Both cycles cross zero together. 19 Oct 2063 12:00 — 67th birthday. A personal anniversary marker. 20 Oct 2063 12:00 — Physical + emotional. Both cycles cross zero together. 3 Nov 2063 12:00 — Emotional + intellectual. Both cycles cross zero together. 3 May 2064 00:00 — Physical + intellectual. Both cycles cross zero together. 6 Sep 2064 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 2064 12:00 — 68th birthday. A personal anniversary marker. 7 Feb 2065 12:00 — Emotional + intellectual. Both cycles cross zero together. 17 May 2065 12:00 — Physical + intellectual. Both cycles cross zero together. 25 Jul 2065 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 2065 12:00 — 69th birthday. A personal anniversary marker. 15 May 2066 12:00 — Emotional + intellectual. Both cycles cross zero together. 1 Jun 2066 00:00 — Physical + intellectual. Both cycles cross zero together. 12 Jun 2066 12:00 — Physical + emotional. Both cycles cross zero together. 19 Oct 2066 12:00 — 70th birthday. A personal anniversary marker.
BirthdayTwo cyclesAll three at zeroComplete reset
Physical + intellectual23 Jan 2057age 60.3 · Both cycles cross zero together.
Emotional + intellectual7 Jul 2057age 60.7 · Both cycles cross zero together.
Physical + emotional18 Aug 2057age 60.8 · Both cycles cross zero together.
Physical + intellectual7 Feb 2058age 61.3 · 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.