Here's a look at some key sites in the USA. Starting of course with New York, and the capital, Washington D.C.

Freemasons have probably been into Phi days all along; I suspect this because the man chosen to rebuild London after the great fire of 1666 placed the many churches he designed in such a way as to create Phi ratios between them, and also along Phi day sunrise azimuths. I found this out while looking at the location of the London Mithraeum on Google Earth, and was surprised to find so many churches dedicated to Michael and Mary near by, and surprised further to discover they were all designed by the same person.

Below is a Google Earth image, on which I've placed some of Christopher Wren's churches. Note how the mithraeum is central to the design. You can see many of the churches are named after the Archangel Michael and Mary, which is significant in itself as churches named after these two figures form the lynch pins of important alignments all over Europe, most famously from Skellig Michael, to Saint Michael's Mount, Mont Saint-Michel, and on to Le Mans, Sacra di San Michele, Monte Gargano, and from there to Apollo - Artemis territory: Delphi, Delos, Rhodes, and finally Mount Carmel. This axis is also associated with Mithras, and has been called the Axis of Mithras by Lucas Mandelbaum.

What is surprising is that Phi day alignments were created within London, as well as Michaelmas alignments.

I presume, wrongly perhaps, that Wren's use of Phi in this way is somehow connected to his being a free mason. Whatever the case, Wren must have had a pretty good clock, almost a hundred years before Harrison's chronometer, to be able to measure daylight to the minute, in order to determine the Phi day.

Is there any such use of Phi day and Michaelmas day sunrise azimuths across the pond?

What are the Phi days in New York? www.sunearthtools.com gave this:

On the 29th May (2019 value), there are 14:49:55 hours of daylight, which is almost exactly a Phi ratio of 24 hours. The sunrise azimuth is 60.12, and sunset is 300.01. That's interesting: pretty much 60 degrees either side of north.

And in Washington D.C.?

I looked for the closest dates for a Phi ratio of daylight to darkness, and - well, the crazy thing is I knew it, I realised what I was going to find before I did - the summer Phi day for the capital of the United States of America is the 4th of July.

4 July 14:49:18 azimuth sunrise 59.23 azimuth sunset 300.69

That's insane! And yet, the United States Declaration of Independence, pronounced in 1776, was adopted at a meeting at the Pennsylvania State House in Philadelphia, Pennsylvania, not Washington. John Adams wrote to his wife, "The Second Day of July 1776, will be the most memorable Epoch in the History of America". However, Independence Day was moved to July the 4th, the date that the wording of the Declaration of Independence was approved on. The July Phi day in Philadelphia is not till the 10th. So is the 4th of July being the national day and also a summer Phi day in the capital a coincidence?

Where do the sunrise azimuths for these Phi days lead?

From New York, the Summer Phi day line leads to Egypt but not to a significant place, and also stops by the Cathedral of Saint Michel in Carcassonne, in France. The sunset line heads towards Vancouver Island. And winter Phi days in New York? The latitude means that New York falls five minutes short of being able to have winter Phi days, with the winter solstice day 09:15:16 hours long.

From Washington D.C., the summer Phi day 4th July sunrise line leads to, well, Nabta Playa in Egypt, that's about it, and about 3 miles from a couple of Templar chapels in the Pyrenees, on or near the Prime Meridian. Summer Phi day sunset heads to Washington State.

Washington D.C. is too far south for winter Phi days - the days don't get short enough.

The City of Philadelphia, where independence was declared, is in fact roughly aligned with New York and Washington D.C., and is in fact at a Phi point between these two cities. Independence Hall in Philadelphia is in fact roughly at the Phi mark, but not exactly on the lines that link the White House or the Capitol with the Statue of Liberty, being almost five miles off. Still, there is an intriguing link to Robin Heath's Lunation Triangle: the Capitol in Washington is 123.45 miles from Independence Hall, which is the distance between Stonehenge and Lundy, the too most important components of the Lunation Triangle. 123.45 is 36 x 24 / 7, and 123.45 x 1.618 is 199.7. There are 200.76 miles between the Capitol and the Statue of Liberty. And there are 206.43 miles from the Statue of Liberty to the Lighthouse at Alexandria in Washington, which is very close to the 206.14 miles between the Mont Saint-Michel an Saint Michael's Mount, which form the longer side of the Stonehenge Michael triangle.