Editing Japanese calendar (section)

===''Rokuyō''===
The {{nihongo||六曜|rokuyō}} are a series of six days calculated from the date of [[Chinese calendar]] that supposedly predict whether there will be good or bad fortune during that day.  The ''rokuyō'' are commonly found on Japanese calendars and are often used to plan weddings and funerals, though most people ignore them in ordinary life. The ''rokuyō'' are also known as the {{nihongo||六輝|rokki}}.  In order, they are:

{| class="wikitable"
! Kanji
! Romanization
! Meaning
|-
| {{nihongo2|先勝}}
| {{tlit|ja|Senshō}}
| Good luck before noon, bad luck after noon. Good day for beginnings (in the morning).
|-
| {{nihongo2|友引}}
| {{tlit|ja|Tomobiki}}
| Your friends may be "drawn-in" towards good and evil.  Funerals are avoided on this day (''tomo'' = friend, ''biki'' = pull, thus a funeral might pull friends toward the deceased). Typically crematoriums are closed this day. But, for instance, weddings are fine on this day.
|-
| {{nihongo2|先負}}
| {{tlit|ja|Senbu}}
| Bad luck before noon, good luck after noon.
|-
| {{nihongo2|仏滅}}
| {{tlit|ja|Butsumetsu}}
| Symbolizes the day [[Gautama Buddha|Buddha]] died. Considered the most unlucky day.{{Citation needed|date=November 2011}}  Weddings are best avoided. Some [[Shinto]] shrines close their offices on this day.
|-
| {{nihongo2|大安}}
| {{tlit|ja|Taian}}
| The most lucky day.  Good day for weddings and events like shop openings.
|-
| {{nihongo2|赤口}}
| {{tlit|ja|Shakkō}}
| The [[Japanese clock|hour of the horse]] (11 am to 1 pm) is lucky.  The rest is bad luck.
|-
|}

The ''rokuyō'' days are easily calculated from the Japanese lunisolar calendar. The first day of the first month is always ''senshō'', with the days following in the order given above until the end of the month. Thus, the 2nd day is ''tomobiki'', the 3rd is ''senbu'', and so on. The 1st day of the 2nd month restarts the sequence at ''tomobiki''. The 3rd month restarts at ''senbu'', and so on for each month. The latter six months repeat the patterns of the first six, so the 1st of the 7th is ''senshō'', the 1st of the 12th is ''shakkō'' and the [[Tsukimi|moon-viewing day]] on the 15th of the 8th is always ''butsumetsu''. <!-- Don't use Western solar month names to describe the lunisolar calendar -->

This system did not become popular in Japan until the end of the Edo period.