The calendar of fluffs is inspired by the twelve moon goddesses. While only one moon is seen in the sky, it's said the the twelve moon sisters take turns in the sky because of the fact the moon's markings are different every month, making it 12 in total. After counting how long each marking last, it was found out it's roughly 31 days each, hence creating what we call "a month".
The moon will be up in the sky for roughly 12 hours before the sun comes back for another 12 hours, creating the day and night circle. This can vary of course as there are times where daylight is longer or nighttime is longer, which usually happens during specific seasons that appear in some regions.
As for weeks, Fluffs do not have 7 days a week but instead 12. However they do not have names for the weekdays. They simply separate each months into 12 days a week and count each day.
Hours in a day: 24
Days in a week: 12
Days in a month: Around 31, depends on month
Days in a year: 365
Dreamfluffs do not use the word "month" to refer to months. Instead, they refer to them by the moon markings. Like stated before, a new marking can be seen on the moon above. These markings are used to refer to the months, but its more common to simply call every month by its number. So January would be Moon 1, February would be Moon 2 and so no.
When referring to a month in spoken form, fluffs find it easier to say the animal of the moon instead of the number.
Example: "We are currently in the dove moon"
However, when referring to a month in written form, fluffs will write the number of the moon instead of the animal unless its for something fancy, like a record. This is because using the number is faster and easier.
Example: "Born 12/1/XX" (Born 12 of dove moon year XX)"
But, there are many ways to write a date and it is usually personal preference. Some places might prefer to write their dates one way and others the other way. Some of the ways you can write dates are as follow :
1st of Moon 1 , year
1st of Peacock moon , year
01/Moon 1 /Year
01/Peacock moon/Year
01/01/Year (most common one used)