Samhain is upon us. Tomorrow night is supposed the night when the veil between worlds is thinnest. I am not sure how this is supposed to be as a date on the calendar. The calendar has been changed so many times it is mind boggling. Currently we are in what is known as the gregorian calendar. It is also called the Western Calendar and the Christian Calendar. 
The reason I bring this up is because the timing actually changes with this calendar. It is so inaccurate that we have to add a day to it every four years just to catch up. Even this day is thrown off a bit every so often so that a day has been added or deleted from the calendar every so often in one month or another to just to try and keep it fairly accurate. The current calendar is more or less centered around the spring equinox. The Roman Catholic Church decided that this is the most accurate way to keep tabs on the dates even though the new year starts officially on January 1st. Many pagan folks consider this to be their new year and some choose halloween.
There is a more accurate calendar. This is the lunar calendar. There are thirteen months in the lunar calendar. There are 12 months in the Christian calendar. But there is that pesky thirteenth moon every now and then, The word month comes from moon so the word would be more accurately “Moonth”. The thirteenth moon shows up as what we call a ‘blue moon’.
In the more accurate lunar calendar there are 28 days in a month. The moon is visible for 27 days and dark for 1 day. The moon takes 27.32 days to completely orbit the earth. That is roughly 655 hours and 12 minutes. The moon phases take 29 ½ days which is why they try to average each month in the Current calendar to about 30 days. The anomalistic month, and has an average length of 27.554551 days (27 d 13 h 18 min 33.2 s).This measured by the what is known as the line of the apsides. This is the apogee and the perigee of the moon. and this cycle is perfected every nine years. That is, it slightly off according to the solar calendar is it progressively gains a little bit if distance until it is once again back in the same spot it was nine years ago. This is what is used to predict the eclipses and explains why the eclipses do not fall consistently on the same dates every year. 
The reason I bring this up is because of how the moon affects us physiologically and , hence, psychically. When I say psychically I mean mentally, how it affects our brains. Of course it is acceptable to read psychic as meaning telepathy or “clairwhateverness” as these are phenomena of the brain. In the area of majyck or witchcraft this is an important factor to take into consideration when attempting a working of some sort.
These are the reasons I like to stress that one should start keeping a majyckal diary of dreams and workings. The dates are important and information you should include in your majyckal diary would be the moon phases, what astrological sign they are in and how you are feeling that day or at that time. In this way you will be able to establish a pattern which is predictable for you to use for finding your ‘auspicious days’. The biorhythms are fairly accurate and so are astrological correspondence tables but each person is unique and even people who share the same birthdays will discover that their particular cycles are not perfectly in sync.
I would suggest learning to keep the majyckal diary dated according to lunar calendar while also keeping the gregorian dates for easier reference. The most well known lunar new year is that of the Chinese calendar. It would be difficult to designate the year “one” as the calendars have changed so often and there is no real way to determine that other than the arbitrary dates already set in various traditions. For majyckal reasons of date keeping I would set the year one to be the year of your birth and the first day of the new year to be your birthday. Solipsistically speaking time and space began on the day you were born and they will end on the day that you die. Solipsism is of course a fatal error, but for all intents and purposes when keeping an accurate diary of the phases of your life it would in actuality be more accurate than any other calendar you could go by. Here is a Chinese age calendar you can use to determine your age according to the lunar calendar.
 "The spiritual effect of the moon on man." 2008. 30 Oct. 2013 <http://www.spiritualresearchfoundation.org/articles/id/spiritualresearch/spiritualscience/spiritualeffectofmoon_on_man>