Here situation with me is that I remember the month of our first meeting but not the date, even for our anniversary we decided to pick a date approximately since we weren't sure when did we start. We werent really into dates at the time, and now looking back I see that it's in the middle of june, and we have definitely had started by the end of the July (28th or 29th) 

Does this mean I should stick to composite/davison or?

Thank you

Yes

I can answer about the Davison. The composite chart places the points and planets at the nearer midpoint of the points and planets of the two people's natal charts.

The Davison is similar, but instead of taking the midpoint of my Sun/her Sun, my Moon/her Moon, etc., etc., it takes the midpoint in time and space between my birth and hers, and you do a chart for that time and place.

If the two people were born an even number of years, and an even number of months, apart the composite and the Davison may not be very different at all. If they were born an odd number of years or months apart, there will be significant changes. 

In the case of me and my wife, the halfway point between our births was sometime on April 4, 1981, and the place somewhere in the Atlantic Ocean. On April 4, 1981, the "Davison date" for my wife and me, the Moon was at 14 Aries at the relevant time. But in the composite, my Moon is at 7 Libra, hers is at 21 Libra, the composite Moon is at 14 Libra, halfway between the two. So the Moon is in opposite signs in the composite and the Davison. The rest of the planets didn't change really at all.

The reason for the Moon flipping from Libra to Aries is that my wife and I were born an odd number of lunar months from each other, so the midpoint in time between our births fell on a "half-month" from our natal Moons.

Had we been born an odd number of years from each other, the Sun would flip as well.

Example: Person A is born June 1, 1989 with Sun at 10 Gemini. Person B is born June 11, 1990 with Sun at 20 Gemini. The composite Sun would be 15 Gemini. But the midpoint in time between these two dates is December 3, 1989. So the Sun is in Sagittarius.

And, Mercury and Venus always being near the Sun in a chart, they will be on the opposite side of the zodiac as well. Venus is at 3 Gemini in the composite, but 23 Scorpio in the Davison. So in that case the composite and the Davison are very, very different.

For a composite, there is no birthplace needed. Everything is just at the midpoints of the two charts. Halfway between Asc A and Asc B, halfway between MC A and MC B, etc.

For a Davison, it is a point halfway in space between the two birthplaces. So Person A born in New York City (40.7 N, 74 W) and Person B born in Wichita (37.7 N, 97.3 W). The halfway point is at 39.2 N, 86.65 W, so you do the chart for there. As it happens that point falls in central Indiana somewhere. But, happily, you don't have to calculate it yourself. Just enter the birth data for the two people on astro.com and the site calculates it for you.

Osiris Wife said
 

Which birth location would you use for a composite or Davison chart?

I use the reference place, being the place where the relationship is taking place. Intuitively this makes more sense to me, rather than some arbitrary shortest distance of an average latitude and longitude that could land up being in the ocean if two people are from different hemispheres, continents etc. If you're born in the same country/region then it might not be as much of an issue.

  

Personally I use the halfway point. Why would it matter if the point is in the ocean? You're just generating a chart based on halfway between the two births. The whole premise of the Davison is that dividing the time between the births in half matters somehow, and the same would apply to the space.

Many thanks. Started tracking the first meeting charts now. I think its been significant moment for all involved.