The Origins

Well, I searched for accurate data about the origins of the Big Bang theory and model like anyone else would have done these days, by googling it. What you find, basically, is that in 1927 - and fate is not without a sense of irony, again - a Belgium catholic priest named Georges Lemaître emitted the hypothesis of the universe coming from a "primeval atom". Later on, in 1929, Edward Hubble observed what is called "nebulae recession", in other words the fact that all the galaxies were moving away from each other, proving the expansion of the universe, and which indirectly demonstrated the hypothesis, because as they were moving away from each other now, we could fairly deduce that they were all coming from the same (spacetime) place, the so-hypothesized "primeval atom" now referred to as the "Big Bang". All subsequent observations have (rather) confirmed it so far, and even if a lot of unknowns still exist, the Big Bang model continues to stand as the most largely shared one. Of course, everybody in the astronomy field is longing for THE unifying theory, that will describe the behavior of everything - from quarks to galaxies - with the same set of (probably simpler) equations; but unfortunately, we're not there yet...

The First Meta-Move

The thing is, we had a lot of different visions of the "world out there" since the beginnings of our wonderings about it, and today it's quite natural to know that the big bang model is just a model of representation and as such, a kind of map, therefore not the territory. Now, think about it, this was the first time in history, when we adopted a new vision of the universe, knowing that it was just a vision, just a practical way to exchange about it, to study it, to better understand it and expand the vision. For the very first time, the "map" was really auto-reflexive, the map was aware of its own "map-hood".

If you replace it within the history of our ways to consider and describe the universe, it was the time when we began to understand - collectively - that what we were seeing of it was only our (very) relative way of perceiving it. And so we built a model, based on general relativity, which was taking this fact into account. Mentally speaking, it was the first meta-move in our understanding of the universe. Before it, people talking about "out there" were always referring to "what was out there" (and quite often it was on the air of "either you believe what  I say or I kill you"). With the big bang model, our representation of the universe has become a representation of "what we perceive and know of what's out there".

That's why I thought we should have a calendar that is taking this particular historic fact into account.

The Origin

Conventionally, located "between" 01.01.1927 and 01.01.1929, so about 01.01.1928. But, as a calendar eager to be in tune with the universe, making it fit more accurately with the phases of the sun seemed to me as pretty much... mandatory. The first day of the ascending phase of the sun is the day after the longest night of the year, that means:

December 1927, the 22nd - Day One, Year One

And thus today which, in the Gregorian calendar, is June 2010, the 2nd  corresponds to Vida 83, the 71st in the Dawn Era one. And technically, it ought to be understood as: the 71st day of the 2nd phase of the 83rd year of existence of the universe as we see it.

The 4 Phases of the Sun

Here, the calendar loses a bit of its universality, since it takes a North hemisphere / temperated region's point of view, but well, I'm living there and this is typically what it is all about, nope? Relativity?

So, 'round here, we have 4 seasons that can be easily distinguished, that's why I divided the year into 4 phases, with the idea of keeping it as simple as possible. So 365 days (on regular years), or 364 + 1, or 91*4 + 1. The basic number of days for each phase: 91 days. The day left to make 365, I chose to add it to the first phase, systematically, as well as the supplemental day of bissextile years.

Concerning their names, I went for emphasizing what I saw as the main fact about each phase.

And here's what we get:

Conversion Issues

Well, this is the tougher part of it, knowing how to convert a date from one calendar to the other and vice-versa.

One good thing, is that the table above gives you fixed landmarks at the exception of the Auro phase, depending on the bissextiality of the year.

The Sola phase, for example, will always begins on the 23rd of June, and so, firstly, use the table to remember starting dates.

Then, for example, you can use this:

Phase switching months: December / March / June / September

Starting days:                     22     /    24    /   23   /    22

Nb days till end of month*: 10     /     8     /     8   /     9     (*: including starting days and last day of gregorian month)

Abbreviations: SD = starting day; NDFM = Number of Days to Finish current Month; GY = Gregorian Year; GM = Gregorian Month; DY = Dawnian Year; DP = Dawnian Phase; GD = Gregorian Day; DD = Dawnian Day; FGMD = Full Gregorian Months Duration.

Gregorian Months Duration:

Jan (31); Feb (28/29b); Mar(31); Apr(30); May(31); Jun(30); Jul(31); Aug(31); Sep(30); Oct(31); Nov(30); Dec(31)

Conversion from Gregorian to Dawnian

Year

If GD between 01.01 and 21.12: DY = GY - 1927

If GD between 22.12 and 31.12: DY = GY - 1926

GD.GM to DD.DP

You have to count!

First, determine the starting day of the dawnian phase you're in, along with the dawnian phase itself:

If GD between 22.12 and 23.03: SD = 22.12 (DP = 01 = Auro)

If GD between 24.03 and 22.06: SD = 24.03 (DP = 02 = Vida)

If GD between 23.06 and 21.09: SD = 23.06 (DP = 03 = Sola)

If GD between 22.09 and 21.12: SD = 22.09 (DP = 04 = Narke)

Second, determine the number of days between SD and the end of that month (NDFM):

If SD = 22.12: NDFM = 10

If SD = 24.03: NDFM = 8

If SD = 23.06: NDFM = 8

If SD = 22.09: NDFM = 9

For a given GD.GM.GY, add NDFM to GD to the number of days of full Gregorian months between SD and your GD.GM.GY, or yet:

DD = NDFM + FGMD + GD

Ex: Let's do it with today's date. June 2010, the 2nd. We're not yet the 23rd, so we're still in the Vida phase, SD = 24.03, DP = 02, NDFM = 8.

Full Gregorian months are: April and May, so NDFM = 30 + 31 = 61

DD = NDFM + FGMD + GD = 8 + 61 + 2 = 71

DY = 2010 - 1927 = 83

DD = 71.02.83 = Vida 83, the 71st.

Of course, there is some exceptions (if not it wouldn't be fun), in cases where you're between SD and the end of the corresponding month, for example on March 28th. But then it's easy, DD = GD - SD + 1 = 28 - 24 + 1 = 5. It's Vida, the 5th.

Conversion from Dawnian to Gregorian

 Once again, if you remember starting days you're pretty much done. And remember that concerning year conversion, this time the exception case is between Auro the 1st and Auro the 10th.

Year

If DD between 01.01 and 10.01: GY = DY + 1926

If DD between 11.01 and 91.04: GY = DY + 1927

DD.DP to GD.GM

Find the starting day for the phase you're in, and the corresponding NDFM.

Auro (01): SD = 22.12: NDFM = 10

Vida (02): SD = 24.03: NDFM = 8

Sola (03): SD = 23.06: NDFM = 8

Narke (04): SD = 22.09: NDFM = 9

If DD <= NDFM: GD = SD + DD, GM = GM(SD)

If DD > NDFM: well... the equation is a bit more complicated to write down, and it's much easier to simply count.

Basically DD represents the number of days since SD, so let's take an example... completely random... Narke 62, the 49th.

GY = DY + 1927 = 1989

SD = 22.09, NDFM = 9, and we're 49 days later, or yet: NDFM + 40. October having 31 days, these 40 are decomposed in 31 + 9.

So, overall we got: 49 = 9 + 31 + 9, it was November, the 9th.

Ah, yes... Maybe some problems in Deutschland...