Date Selection Calculator

The date selection calendar: for each day, the Officer that governs it, whether it is favorable, neutral or unfavorable, and what it is suited to. Tap a day to open it.

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  1. Sat 21 建 Establish lunar day 13 己亥 JǐHài Neutral

    Saturday, November 21, 2026

    Neutral

    Officer of the day · 1 of 12

    建 Establish Jiàn · Establish

    It is the day on which the branch of the day matches that of the month, and it opens the cycle. In ancient times the emperor devoted it to prayers for the harvest. Today it is chosen for getting engaged and asking for someone's hand, for starting a job or taking on a new role, for doing business and for visiting friends: in the old calendars “visiting friends” meant arranging a marriage, which was business in every sense. It is good for setting out, for starting a treatment, a school or a course, and for building. It is not good for demolishing or for innovating, which are another matter.

    Favorable for

    • Medical treatment
    • Marriage proposal, engagement
    • Starting a job or a new role
    • Launching a business, a project, a negotiation
    • Enrolling in a course of study
    • Setting out on a trip for pleasure or business
    • Rebuilding work

    Unfavorable for

    • Wedding
    • Demolition
    • Innovation

    The 協紀辨方書 Xiéjì Biànfāng Shū (“Book for Harmonizing the Times and Distinguishing the Directions”) holds it good or bad according to the stars that accompany it: it is the “lord of the month” and gives strength to whatever it meets.

    Details of the day

    Available when you log in with a shop account, free of charge. Log in

    Spirit of the day

    Available when you log in with a shop account, free of charge. Log in

    Symbolic stars

    Available with the yearly calendar. Find out how to get it

    Day star

    Available with the yearly calendar. Find out how to get it

    Lunar mansion

    Available with the yearly calendar. Find out how to get it

    Da Gua hexagrams

    Available with the yearly calendar. Find out how to get it
Favorable Neutral Unfavorable Start of the solar month
Time zone: Rome (automatic)

Saturday, November 21, 2026

Neutral

Officer of the day · 1 of 12

建 Establish Jiàn · Establish

It is the day on which the branch of the day matches that of the month, and it opens the cycle. In ancient times the emperor devoted it to prayers for the harvest. Today it is chosen for getting engaged and asking for someone's hand, for starting a job or taking on a new role, for doing business and for visiting friends: in the old calendars “visiting friends” meant arranging a marriage, which was business in every sense. It is good for setting out, for starting a treatment, a school or a course, and for building. It is not good for demolishing or for innovating, which are another matter.

Favorable for

  • Medical treatment
  • Marriage proposal, engagement
  • Starting a job or a new role
  • Launching a business, a project, a negotiation
  • Enrolling in a course of study
  • Setting out on a trip for pleasure or business
  • Rebuilding work

Unfavorable for

  • Wedding
  • Demolition
  • Innovation

The 協紀辨方書 Xiéjì Biànfāng Shū (“Book for Harmonizing the Times and Distinguishing the Directions”) holds it good or bad according to the stars that accompany it: it is the “lord of the month” and gives strength to whatever it meets.

Details of the day

Available when you log in with a shop account, free of charge. Log in

Spirit of the day

Available when you log in with a shop account, free of charge. Log in

Symbolic stars

Available with the yearly calendar. Find out how to get it

Day star

Available with the yearly calendar. Find out how to get it

Lunar mansion

Available with the yearly calendar. Find out how to get it

Da Gua hexagrams

Available with the yearly calendar. Find out how to get it

For students: how we calculate, the rules and the sources.