Astrological Calendars and Clocks

Astrological time is interesting. Have you ever wondered why there are 12 months in a year? 7 days in a week? 24 hours in a day?

There are 12 months because the moon completes 12 cycles (12 full moons) during a year (see the word “moon” in “month”?). That’s also why there are 12 zodiac signs.

There are 7 days in a week because there are 7 astrological planets. One owns each day.

There are 24 hours in a day because there are 12 signs, and the day has 2 halves, daytime and nighttime. 12×2 = 24. The first half of the male signs and last half of the female signs belongs to the lord of the daytime, the Sun. The first half of the female signs and the last half of the male signs belongs to the lord of the night, the Moon. So, there are 24 hours.

The planet who owns the hour, day, month and year gets a boost in how astrologically strong it is at the time.

It is based on this universal principle:

Day Planet
Sunday Domingo Sun
Monday Lunes Moon
Tuesday Martes Mars 火星
Wednesday Miercoles Mercury 水星
Thursday Jueves Jupiter 木星
Friday Viernes Venus 金星
Saturday Sabado Saturn 土星

Just remember that the astrological day starts and ends at sunrise, not at midnight! So, if your normal calendar says “Monday” but it is before sunrise on that day, the astrological day is still Sunday.

The astrological “year” starts on the day the Sun enters Aries. Whatever planet owns the day of the week on which this happens becomes the lord of the year and gets a slight boost in strength for the duration of the year (15 virupas).

Astrological “months” start every time the Sun enters a new sign. Whatever planet owns the day of the week on which the Sun enters a new sign becomes the lord of that month a gets a boost in strength during that month (30 virupas).

Astrological days are simple. All you have to remember is that they start at sunrise, not midnight. Whatever planet owns the weekday gets a boost in strength during that day. (45 virupas).

Astrological hours are not exactly the same as our modern hours, but are based on sunrise. At sunrise, the first hour begins. The duration of time between one sunrise and the next gets divided into 24 portions. A different planet rules each hour. The lord of the weekday owns the first hour when the Sun rises. The next hour belongs to the lord of the 6th weekday from the Sun, Venus. The third hour belongs to the lord of the 6th weekday from Venus, Mercury. The fourth hour belongs to the lord of the 6th weekday from Mercury, the Moon. And so on. Whatever planet owns the current hour gets a significant boost in strength (a full rupa, 60 virupas).

– Vic DiCara
© 2010 Vic DiCara, All Rights Reserved


  1. carlos says:

    this is taken from an article I sent to you

    1 prana = 10 syllables long (gurvakshara) = 4 seconds
    6 pranas = 1 Vinadi = 24 seconds
    60 Vinadi = 1nadi = 24 minutes
    60 nadis = 1 day (1 ahoratra) = 24 hours
    and so on until reaching the divine days, or ages, or Yugas.

    you find any meaning?


  2. Praveen says:

    Hi Vic Ji,
    What about the order of the weekday itself? On what basis is it based?
    -Praveen SA


    1. vicdicara says:

      First comes the Sun and Moon – who are the original owners of everything. They take the first two days, Sunday and Monday. Next, the first outer planet, Mars takes Tuesday. Next, the first inner planet Mercury takes Wednesday. Next, the second outer planet Jupiter takes Thursday. Then, the second inner planet Venus takes Friday. Finally the final planet Saturn takes the final day, Saturday.


      1. Praveen says:

        Hi Vic Ji,
        Why this inner outer sequence and why the 6th weekday is taken?

        Thanks in advance.
        -Praveen SA


    2. vicdicara says:

      Praveen, here is a full explanation:


  3. penny says:

    I’ve been learning Mandarin for a little while now, It’s good to be able to recognise the characters when I see them about the place 🙂 I love the stories within the characters, like how the character for star,星 has the sun at the top and the character relating to birth at the bottom. Birth of a sun!

    It’s interesting looking at the meanings of the characters for the planets other then the Sun and Moon, being the yang and yin forces respectively. And the five elements ‘Wu Xing’ (though its been said that more accurately, they should be referred to as ‘movements’, ‘steps’, ‘phases’ rather then elements.) I was interested in differences between the systems, seeing Mercury for example is associated with the character for “water” in the Chinese, where it is related to the element of earth in Vedic Astrology, but I think looking at the meaning of Wu Xing, gives a different dimension to what is meant when the character of water is associated with Mercury.

    I spoke to my Chinese teacher awhile ago about why it is common for them in modern times, to just give a number to each day such as monday translated into English is star period 1星期一, tuesday star period 2 etc, and all of them are like this until sunday which isn’t given Star period 7, but 星期天 or 星期日.

    But looking at the Chinese dictionary I found this character: 曜 – haha its rather small to read! But it means bright/ glorious/one of the planets.

    So月曜日becomes monday instead of: 星期一, that is commonly in use nowadays.

    The celestial body name,月 followed by the character 曜, and then the character usually used for sun日, in this case I assume – denoting ‘day’. I like that much better seems more authentically like the Ancient Chinese!

    Though saying “I will see you tomorrow, star period 1” sounds funny in my mind, like something a star trek robot would do after downloading Chinese English translations into his processing unit.


    1. vicdicara says:

      This is a FANTASTIC comment, Penny. Thank you!

      In Japan we use what you are talking about as old:

      日曜日 – nichi-yoou-bi – which means “the day when the Sun is foremost” (Sunday)
      月曜日 - getsu-yoou-bi – Monday
      火曜日 - Tuesday

      We use the character “Sun” 日 to refer to the sun’s cycle of time (a day)
      for shorter “stations of the Sun” we use 時 (hour)
      and “division” of the hour we write as 分 (minute)

      We use the character “Moon” 月 to refer to the Moon’s cycle of time (a month)

      Modern japanese has replaced the month names with numbers.

      The correlation of numbers to days is interesting from a numerological point of view, you might like this article:

      And the days of the week and, why specific planets are 曜 (prominent) on specific days might also interest you:

      The correlation of the elements differently to planets in Indian and Chinese systems is facinating and I would like to hear you explain your understanding of it in more detail!


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