When are the Tenshanichi in 2026?

The Tenshanichi in 2026 are March 5 (Thu), May 4 (Mon, holiday), May 20 (Wed), July 19 (Sun), October 1 (Thu) and December 16 (Wed), six in total. Of these, March 5, July 19, October 1 and December 16 also coincide with Ichiryumanbai-bi. March 5 also coincides with Taian and Tora no Hi, but note that July 19 coincides with Fujojuu-bi.

How many Ichiryumanbai-bi are there in a year?

Two zodiac-branch days in each solar month are Ichiryumanbai-bi, so there are 4 to 7 a month and around 60 a year: 64 in 2026 and 60 in 2027. Because there are so many, many people choose days that overlap with other lucky days such as Tenshanichi, Taian and Tora no Hi, which you can check all at once under "Strongest lucky days (overlapping)" in the yearly list.

Is today Taian? How is Rokuyo determined?

When you open the page, today's Rokuyo and special days are shown at the top. Rokuyo is determined by adding the lunar month and day and dividing by 6: 0 is Taian, 1 is Shakkou, 2 is Senshou, 3 is Tomobiki, 4 is Senbu and 5 is Butsumetsu. Because the sequence resets whenever the lunar month changes, the order Senshou, Tomobiki, Senbu, Butsumetsu, Taian, Shakkou can skip at times.

What is a good day to buy or start using a wallet?

Generally Tenshanichi, Ichiryumanbai-bi, Tora no Hi, Tsuchinoto-mi no Hi and Mi no Hi are considered good, and Fujojuu-bi is avoided. If you choose "Buying / starting to use a wallet" under "Find by purpose", days where these overlap get more stars. You can buy a wallet on one lucky day and start using it on another.

What days are recommended for marriage registration, and which should be avoided?

Taian, Tenshanichi and Ichiryumanbai-bi are popular, and Tomobiki is also considered good for celebrations. Butsumetsu, Shakkou and Fujojuu-bi are often avoided, and some people avoid Tora no Hi for weddings because it suggests the bride "returning home". Choose "Marriage registration / wedding" under "Find by purpose" and turn on "Weekends and holidays only" to find candidates among days off.

What is Fujojuu-bi? What happens when it overlaps with Ichiryumanbai-bi?

Fujojuu-bi is an unlucky day on which nothing is said to come to fruition, and it is fixed every 8 days within each lunar month (the 3rd, 11th, 19th and 27th in lunar months 1 and 7). There are 49 in 2026. Some believe the lucky effect is cancelled when it overlaps with Ichiryumanbai-bi or Tenshanichi, so this tool excludes such days from the strongest lucky days and lowers their stars for each purpose.

What is Sanrinbo? Should I avoid it for moving too?

Sanrinbo is an unlucky day for construction; raising the ridgepole or holding a groundbreaking ceremony on this day is said to cause a fire that destroys even the neighboring houses. It is originally a calendar annotation about construction, but some people also avoid it for moving. This tool deducts the most for "Groundbreaking / ridgepole raising / construction start" and a little for "Moving / taking delivery of a car".

When is Doyo no Ushi no Hi in 2026?

The summer Doyo no Ushi no Hi, when people traditionally eat eel, is July 26 (Sun) in 2026. Because Doyo occurs in every season, there are 5 Doyo no Ushi no Hi in the year: January 27, April 21, May 3, July 26 and October 30. Choose "Doyo no Ushi no Hi" in the yearly list to check other years.

Can the dates shown differ from other calendars?

How Rokuyo, Ichiryumanbai-bi and Tenshanichi are determined is the same as in common calendars, but the way special days are counted may differ depending on the almanac publisher or school. For the 2033 problem in the lunar calendar (a year with two months that contain no principal term), the calculation treats it as a leap 11th month. For important dates, also check the calendar used by the venue or temple/shrine.

Lucky Day Calendar | Find Auspicious Days: Ichiryumanbai-bi, Tenshanichi, Taian

Rokuyo (Taian, Butsumetsu, etc.) plus Ichiryumanbai-bi, Tenshanichi, Tora no Hi, Mi no Hi, Tsuchinoto-mi no Hi, Kinoene no Hi, Doyo no Ushi no Hi, Fujojuu-bi and Sanrinbo are combined in one calendar. Tap a date to see its lunar date, sexagenary term and 24 solar term, along with how well it suits marriage registration, a new wallet, opening a business, moving, a groundbreaking ceremony, lottery tickets and shrine visits. "Find by purpose" ranks lucky days from today up to one year ahead by stars and can be limited to weekends and holidays. The yearly list can be copied or added to your phone's calendar (.ics). The calendar for 1950-2100 is calculated in your browser from the positions of the sun and moon.

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About Lucky Day Calendar | Find Auspicious Days: Ichiryumanbai-bi, Tenshanichi, Taian

The Lucky Day Calendar lets you check Rokuyo (Taian, Tomobiki, Butsumetsu, etc.) together with Ichiryumanbai-bi, Tenshanichi, Tora no Hi, Mi no Hi, Tsuchinoto-mi no Hi, Kinoene no Hi, Doyo no Ushi no Hi, Fujojuu-bi and Sanrinbo on a monthly calendar and a yearly list. Tap a date to see its lunar date, the day's sexagenary term, the 24 solar term and seasonal days (zassetsu), plus how well it suits marriage registration, a new wallet, opening a business, moving, a groundbreaking ceremony, lottery tickets and shrine visits, shown as stars. "Find by purpose" ranks the lucky days from today up to a year ahead by score and can be limited to weekends and holidays. Because the calendar is calculated from the positions of the sun and moon, you can look up any day from 1950 to 2100.

How to use Lucky Day Calendar | Find Auspicious Days: Ichiryumanbai-bi, Tenshanichi, Taian

1Open the page to see today's Rokuyo and special days, and the number of days until the next Ichiryumanbai-bi, Tenshanichi, Taian and Tora no Hi
2On the "Calendar" tab, choose a month and tap a date to see its Rokuyo, lunar date and sexagenary term, and the meaning of its lucky and unlucky days
3To decide on a date, open the "Find by purpose" tab and choose a purpose such as marriage registration, wallet, opening a business or moving, and a period
4If needed, tick "Weekends and holidays only" and pick from the candidate days with the most stars
5On the "Yearly list" tab, choose a type such as Ichiryumanbai-bi or Tenshanichi and a year, then copy the list or use "Add to calendar (.ics)" to import it into your phone's calendar

Great for

Quickly check whether today is Taian or Butsumetsu, or an Ichiryumanbai-bi
Find the next Ichiryumanbai-bi or Tenshanichi to choose the day to start using a new wallet or open a bank account
Pick a wedding or marriage registration date from weekends when Taian overlaps with Tenshanichi or Ichiryumanbai-bi
Choose a day for moving, taking delivery of a car or a groundbreaking ceremony while avoiding Butsumetsu, Fujojuu-bi and Sanrinbo
Choose a business opening day, contract day or lottery-buying day from the strongest lucky days when auspicious days overlap
Plan a visit to a Benzaiten shrine to match Mi no Hi and Tsuchinoto-mi no Hi
Add a year of Ichiryumanbai-bi and Tenshanichi to Google Calendar or the iPhone calendar
Look up lunar dates, the day's sexagenary term, and the dates of the 24 solar terms, Setsubun, Higan and Doyo

Good to know

Rokuyo is determined by the remainder of (lunar month + lunar day) divided by 6, so lunar January 1 is Senshou, February 1 is Tomobiki, and so on; the sequence shifts at the start of each month. The lunar calendar is calculated with the rules of the Tenpo calendar: the day of the new moon (saku) is day 1, and whether a month contains a principal term (such as Rain Water or the equinox) decides the month number and leap months.
Ichiryumanbai-bi, Tenshanichi and Sanrinbo are determined by the solar month (setsugetsu), delimited by the "setsu" such as Start of Spring and Awakening of Insects, and the day's sexagenary term. As a result, even within the same Gregorian month, the zodiac branch that applies changes before and after the setsu day.
Tenshanichi falls on Tsuchinoe-tora (戊寅) from Start of Spring to the day before Start of Summer, Kinoe-uma (甲午) from Start of Summer to the day before Start of Autumn, Tsuchinoe-saru (戊申) from Start of Autumn to the day before Start of Winter, and Kinoe-ne (甲子) from Start of Winter to the day before Start of Spring, so there are only 5 to 6 a year. In 2026 they are March 5, May 4, May 20, July 19, October 1 and December 16.
The "strongest lucky day" is shown as a day when Tenshanichi or Ichiryumanbai-bi overlaps with another lucky day (Tenshanichi, Ichiryumanbai-bi, Taian, Tora no Hi, Mi no Hi, Tsuchinoto-mi no Hi, Kinoene no Hi) and is not a Fujojuu-bi. Definitions differ between sites, and some include days that overlap with Fujojuu-bi.
The stars for each purpose are the total of scores given to lucky and unlucky days for that purpose. For example, for marriage registration Taian and Tenshanichi are +3, Ichiryumanbai-bi is +2, and Butsumetsu and Fujojuu-bi are -3. The weights are described on screen and are a guide based on common traditions of calendar annotations.
The dates of the 24 solar terms are calculated from the sun's ecliptic longitude, and cases that fall within a few minutes of midnight are corrected so that the dates match the National Astronomical Observatory's calendar data.
The luck of calendar annotations is a folk custom with no scientific basis. Some days are treated differently depending on the temple or shrine, the region, and the almanac publisher.
All calculations are done in your browser, and your input and the dates you view are never sent to a server.

Questions this tool answers

Use Lucky Day Calendar | Find Auspicious Days: Ichiryumanbai-bi, Tenshanichi, Taian for searches like these:

I want to know whether today is Taian or Butsumetsu
I want to know when the next Ichiryumanbai-bi is
I want to know the Tenshanichi dates in 2026
I want to know the strongest lucky days when Ichiryumanbai-bi and Tenshanichi overlap
I want to know a good day to buy a wallet
I want to find an auspicious weekend day for marriage registration
I want to know auspicious days for moving or taking delivery of a car
I want to see a list of Tora no Hi, Mi no Hi and Tsuchinoto-mi no Hi
I want to decide on a date while avoiding Fujojuu-bi
I want to know the Doyo no Ushi no Hi in 2026
I want to convert a Gregorian date to the lunar calendar

FAQ

When are the Tenshanichi in 2026?: The Tenshanichi in 2026 are March 5 (Thu), May 4 (Mon, holiday), May 20 (Wed), July 19 (Sun), October 1 (Thu) and December 16 (Wed), six in total. Of these, March 5, July 19, October 1 and December 16 also coincide with Ichiryumanbai-bi. March 5 also coincides with Taian and Tora no Hi, but note that July 19 coincides with Fujojuu-bi.
How many Ichiryumanbai-bi are there in a year?: Two zodiac-branch days in each solar month are Ichiryumanbai-bi, so there are 4 to 7 a month and around 60 a year: 64 in 2026 and 60 in 2027. Because there are so many, many people choose days that overlap with other lucky days such as Tenshanichi, Taian and Tora no Hi, which you can check all at once under "Strongest lucky days (overlapping)" in the yearly list.
Is today Taian? How is Rokuyo determined?: When you open the page, today's Rokuyo and special days are shown at the top. Rokuyo is determined by adding the lunar month and day and dividing by 6: 0 is Taian, 1 is Shakkou, 2 is Senshou, 3 is Tomobiki, 4 is Senbu and 5 is Butsumetsu. Because the sequence resets whenever the lunar month changes, the order Senshou, Tomobiki, Senbu, Butsumetsu, Taian, Shakkou can skip at times.
What is a good day to buy or start using a wallet?: Generally Tenshanichi, Ichiryumanbai-bi, Tora no Hi, Tsuchinoto-mi no Hi and Mi no Hi are considered good, and Fujojuu-bi is avoided. If you choose "Buying / starting to use a wallet" under "Find by purpose", days where these overlap get more stars. You can buy a wallet on one lucky day and start using it on another.
What days are recommended for marriage registration, and which should be avoided?: Taian, Tenshanichi and Ichiryumanbai-bi are popular, and Tomobiki is also considered good for celebrations. Butsumetsu, Shakkou and Fujojuu-bi are often avoided, and some people avoid Tora no Hi for weddings because it suggests the bride "returning home". Choose "Marriage registration / wedding" under "Find by purpose" and turn on "Weekends and holidays only" to find candidates among days off.
What is Fujojuu-bi? What happens when it overlaps with Ichiryumanbai-bi?: Fujojuu-bi is an unlucky day on which nothing is said to come to fruition, and it is fixed every 8 days within each lunar month (the 3rd, 11th, 19th and 27th in lunar months 1 and 7). There are 49 in 2026. Some believe the lucky effect is cancelled when it overlaps with Ichiryumanbai-bi or Tenshanichi, so this tool excludes such days from the strongest lucky days and lowers their stars for each purpose.
What is Sanrinbo? Should I avoid it for moving too?: Sanrinbo is an unlucky day for construction; raising the ridgepole or holding a groundbreaking ceremony on this day is said to cause a fire that destroys even the neighboring houses. It is originally a calendar annotation about construction, but some people also avoid it for moving. This tool deducts the most for "Groundbreaking / ridgepole raising / construction start" and a little for "Moving / taking delivery of a car".
When is Doyo no Ushi no Hi in 2026?: The summer Doyo no Ushi no Hi, when people traditionally eat eel, is July 26 (Sun) in 2026. Because Doyo occurs in every season, there are 5 Doyo no Ushi no Hi in the year: January 27, April 21, May 3, July 26 and October 30. Choose "Doyo no Ushi no Hi" in the yearly list to check other years.
Can the dates shown differ from other calendars?: How Rokuyo, Ichiryumanbai-bi and Tenshanichi are determined is the same as in common calendars, but the way special days are counted may differ depending on the almanac publisher or school. For the 2033 problem in the lunar calendar (a year with two months that contain no principal term), the calculation treats it as a leap 11th month. For important dates, also check the calendar used by the venue or temple/shrine.

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