That's so funny because I have a totally different way of timing and it makes me think if it is at all possible to be correct if it come to this. Here's my way...I hopw you're ready for this
:
Ace of wands = 1st day of spring
2,3,4 of wands = 1st,2nd,3rd dacade of Aries
5,6,7 of wands = 1st,2nd,3rd dacade of Leo
8,9,10 of wands = 1st,2nd,3rd dacade of Sagittarius
Ace of cups = 1st day of summer
2,3,4 of cups = 1st,2nd,3rd dacade of Cancer
5,6,7 of cups = 1st,2nd,3rd dacade of Scorpio
8,9,10 of cups = 1st,2nd,3rd dacade of Pisces
Ace of swords = 1st day of fall
2,3,4 of swords = 1st,2nd,3rd dacade of Libra
5,6,7 of swords = 1st,2nd,3rd dacade of Aquarius
8,9,10 of swords = 1st,2nd,3rd dacade of Gemini
Ace of pentacles = 1st day of winter
2,3,4 of pentacles = 1st,2nd,3rd dacade of Capricorn
5,6,7 of pentacles = 1st,2nd,3rd dacade of Taurus
8,9,10 of pentacles = 1st,2nd,3rd dacade of Virgo
Years would be indicated by Major Arcana.
What do you think? It's not as complicated as it seams. All you need to learn is zodiac signs and when exactly they fall.