Hours (时辰 shíchen) within the Four Pillars of Destiny represent the final and most personal pillar. The secret animal is thought to be a person’s truest representation, since this animal is determined by the smallest denomination. It is used by fortune tellers that use the Four Pillars as the pillar representing information about one's kids or late age.
The hours are represented by the helpful 12 Earthly branches (and the same animal mnemonic as years, months and days within the four pillars) which were determined by Chinese scholars who charted the orbit of Jupiter. The Earthly branches also determine the calendar and compass points.
• 23:00–01:00: 子 rat
• 01:00–03:00: 丑 ox
• 03:00–05:00: 寅 tiger
• 05:00–07:00: 卯 rabbit
• 07:00–09:00: 辰 dragon
• 09:00–11:00: 巳 snake
• 11:00–13:00: 午 horse
• 13:00–15:00: 未 ram
• 15:00–17:00: 申 monkey
• 17:00–19:00: 酉 rooster
• 19:00–21:00: 戌 dog
• 21:00–23:00: 亥 pig
What is your secret animal? And what does it mean to you?
Within the Four Pillars, the month (本月 běnyuè) that you are born is the pillar that represents information about the person's parents or later years in life. Many Chinese astrologers consider the month pillar to be the most important pillar in determining the circumstances of one's adult life.
The Gregorian (Western) calendar is used for day to day activities in most of East Asia, but the Chinese calendar is still used for marking traditional East Asian holidays such as the Chinese New Year (or Spring Festival (春節).
Solar Terms (节气 jiéqi) are based on seasonal markers and make up the Chinese agricultural calendar. This table shows the correlation between the Western calendar and the Chinese months. It also shows which animals (mnemonic) belong to each astrological month giving the second of the four pillars in Chinese astrology and fortune telling.

This is a quick post to help with your vocabulary when talking about things in time. This post relates to weeks, months and years. If you are wanting to talk about things in terms of Days please check my previous post.
一月
yī yuè
January
二月
èr yuè
February
三月
sān yuè
March
四月
sì yuè
April
五月
wǔ yuè
May
六月
liù yuè
June
七月
qī yuè
July
八月
bā yuè
August
九月
jiǔ yuè
September
十月
shí yuè
October
十一月
shí yī yuè
November
十二月
shí èr yuè
December
禮拜 / 星期
lǐ bài / xīng qī
week
這個星期
zhèi gè xīng qī
this week
上個星期
shàng gè xīng qī
last week
下個星期
xià gè xīng qī
next week
月
yuè
month
這個月
zhèi gè yuè
this month
上個月
shàng gè yuè
last month
下個月
xià gè yuè
next month
年
nián
year
今年
jīn nián
this year
去年
qù nián
last year
明年
míng nián
next year