Ehrenfest Calendar

The Ehrenfest Calendar is similar to our world in that there are months and weeks, though their year is 420 days long. As of Light Novel 15 (English Version) a numbering system for the years, the month names or number of months have not been mentioned, nor when exactly one year finishes and the next begins.

First Waterday :- Baptism Ceremony for the Lower City

Early Spring :- Spring Prayer

First Full Moon :- Night of Flutrane (The moon turns red, although Rozemyne thought is looked more dark pink)

Late Spring :- Archduke Conference in the Sovereignty.

Last Waterday :- Coming of Age Ceremony for the Lower City

First Fireday :- Baptism Ceremony for the Lower City

Mid Summer :- Starbind Ceremony and Starbind Festival

Last Fireday :- Coming of Age Ceremony for the Lower City

First Winday :- Baptism Ceremony for the Lower City

Late Autumn :- Harvest Festival. Commoners not in Ehrenfest celebrate their Baptism, Coming of Age and Starbind Ceremony's during the Harvest Festival.

Last Full Moon :- Night of Schutzaria (The moon turns Purple)

Last Winday :- Coming of Age Ceremony for the Lower City

First Earthday :- Baptism Ceremony for the Lower City

Second Earthday :- Nobles winter baptisms, children's debut and gifting ceremony. Start of noble winter socialising.

Mid-Winter :- Dedication Ritual and the appearance of the Lord of Winter.

Late Winter :- Graduation ceremony from the Royal Academy and end of winter socialising. This is the coming of age for nobles.

Last Earthday :- Coming of Age Ceremony for the Lower City

The days of the week are : Waterday, Sproutday, Fireday, Leafday, Winday, Fruitday, and Earthday.

Earthday, being the equivalent of Earth's Sunday is a day off for most professions. Soldiers and Priests are notable exceptions to this rule.


 * 7 Years Old, Baptism
 * 10 Years Old, Nobles are sent to the Royal Academy
 * 15 Years Old, Coming of Age

While not given in a book, a Q&A session published in Fanbook 2 gave some extra details.


 * There are no year or month dates.
 * There are 12 months in a year
 * There are 5 weeks in a month.
 * The weeks are named Waterweek, Fireweek, Windweek, Earthweek, Lifeweek.
 * There is a total of 420 days in a year.
 * The length of the seasons are approximately 3 months long but can vary depending on how hard the Gods work.
 * The hour bell is changed every season to correspond to the correct Divine Colour.

Miya Kazuki published several information on her page

On certain times a day a bell is rung which can be heard throughout Ehrenfest.


 * First bell: Around 4AM, Awakening bell

The first bell serves as alarm clock. Commoners who have to get up early in the morning get up while it is still pitch-black outside. Myne sleeps in because it is too early for her. Pre-baptized children are often left alone until breakfast.


 * Shortly before the second bell rings

Breakfast is finished and commoners get ready for work. At the Gilberta Company, the employees prepare the store to be ready until opening time, as merchants will come when the gate opens. Lutz goes to the store as soon as he finishes his breakfast, because he does not have to wait for Myne.

Workshops which do not depend on the gate's opening tend to start the day later. Effa and Tuuli's workshop open later, which is why they have more time in the morning. Gunther has to get up early when he is on morning shift and be at the gate before it is time to open the gate. Night shift ends when morning shift begins.

Attendants in the temple also get up and start their work. Their work includes carrying water, cleaning themselves, prepare their master's chambers and preparing the kitchen for the chefs, so that they can immediately start cooking when they arrive. If everything is ready they wake up their master.


 * Second bell: 7AM - 7:30 AM

While their form of physical calenders differs from those common on Earth, the people of the Bookworm world do have their own versions of calenders.

Commoners rarely posses calenders of their own. However most workplaces are fitted with a board that has five columns and seven rows of holes, with the columns indicating the week in the month and the rows the weekdays. A wooden peg is put into the hole corresponding to the current day, so workers can orientate themselves and know for example when the next Earthday is.