Rokuyo

The rokuyo are 6 days on the traditional calendar. Traditionally, we have 2 ways to divide a month into some parts for the convenience of counting: jun and rokuyo. When we divide a month into 3 parts with 10 days, the parts have the names: jojun (the first 10 days), chujun (the middle 10 days), and gejun (the last 10 days). When we divide a month into 5 parts of 6 days, each day of the 6 days has its own name this time, and the days usually come in the following order: sensho, tomobiki, senbu, butsumetsu, taian, and shakko.
The 6 days used to not have anything to do with determining good or bad luck. Superstitious fortunetelling data, however, was prohibited to be written in calendars by the Meiji Restoration Government from the viewpoint of modernization, while rokuyo were kept untouched, being considered as a counting system. The fortunetelling-loving Japanese people picked up the rokuyo system to determine good or bad luck.
Sensho (also pronounced senkachi, sakigachi, or sakikachi) is said to be a good day for urgent tasks and lawsuits. The day is also said to bring you good luck in the morning, and bad luck between 2 pm and 6pm.
Tomobiki is said to be a day on which nothing should be settled, but is also believed to bring you good luck in the morning, bad luck in the afternoon, and very good luck in the evening. As tomo sounds the same as the Japanese word friend, and biki sounds like pulling, there is also a tradition of avoiding funerals on this day. It sounds like a typical old-guy joke.
Senbu (also pronounced senpu, senmake, or sakimake) used to be believed to be a lucky day, but, from its sound again, is said to be a bad day for urgent tasks and lawsuits, or to bring you bad luck in the morning, and good luck in the afternoon.
Butsumetsu is said to be a completely unlucky day. The day is usually avoided for weddings and other celebrations. As Buddha prohibited fortunetelling, this belief has nothing to do with Buddhism.
Taian (also pronounced daian) is said to be the luckiest day, and people often choose it for celebrations. Many weddings are held on Sundays that are also taian. Some say that the day used to be considered a rest day, something like the Sabbath.
Shakko (also pronounced shakku, jakku, jakko, or sekiguchi) is said to be an unlucky day, with only noon (between 11 and 1) being a lucky time.
There is a rule to decide the rokuyo name of each day. The names’ order is, as already shown above: sensho, tomobiki, senbu, butsumetsu, taian, and shakko. In the traditional lunar calendar, January and July start with sensho, February and August with tomobiki, March and September with senbu, April and October with butsumetsu, May and November with taian, and June and December with shakko. When you find the 6 names on today’s solar calendar, they sometimes, as a matter of course, skip, which has made the system more mysterious-looking.
This school year finds our school’s entrance examination to be held on February 23, butsumetsu, and its graduation ceremony on March 3, shakko. Do you find them lucky, or unlucky?