Tehillim 102:12 Could Refer to Rosh Hodesh Av 5770

Tehillim 102:12:

יָמַי, כְּצֵל נָטוּי; וַאֲנִי, כָּעֵשֶׂב אִיבָשׁ.

My days are like a lengthening shadow; and I am withered like grass.

Eim Habanim Semeichah:

Furthermore, I challenge the Mabit's assertion that since exile is a verdict accompanied by an oath, we must wait until in its time. Behold, we are now standing in the 703rd year of the sixth millennium (5703 [1943]), and we have certainly reached the stage of in its time. This is not only true according to our mentor, the Ari z"l, who holds that the period of in its time began in the year 5335 [1575], and according to the Or HaChayim HaKadosh and the Chatam Sofer who maintain that the time of Mashiach begain in the year 5500 [1740]. Rather, according to all opinions, now that two thirds of the sixth millennium have already passed, the stage of in its time has undoubtedly arrived.

The Maharsha explains David's statement My days are like an evening shadow (Tehillim 102:12)

This refers to the shadows of evening. David was intimating that the time of redemption had arrived, as it says, And it shall come to pass that at evening time, there will be light (Zecharyah 14:7). That is to say, [redemption will occur] when the Jews have reached the depths of degradation, as it says, When He sees that their power is gone, and none is saved or assisted (Devarim 32:36).

Now, the Maharsha was forced to interpret evening as a degradation because he lived in the first third of the sixth millennium. But we, who live at the end of the second third, can interpret evening according to its simple meaning, for it is already actually evening.

A hymn recited in the morning prayer of the second day of Rosh Hashana states that after two thirds of the day there will be a fulfillment of the verse And it shall come to pass that at evening time, there will be light (Zecharyah 14:7). This indeed corresponds to our times, for we have already reached two-thirds of the day. Furthermore, Tosafot and the Ritva explain that evening implies the time prior to sunset, not nighttime.

The Eim Habanim Semeichah wants to say that 5666 is already called "evening". Perhaps we can say that it's really not "evening" until Minha Gedola. First of all, the word is נטוי - the Mechon Mamre people translate as "lengthening" - not "evening". However, "evening" is an interpretive translation, as it refers to when the sun is נוטה - bending toward the West. When does this occur? At Minha Gedola. See Rashi Shabbat 9b s.v. מנחה גדולה.

According to my calculation, Minha Gedola of the sixth millennium starts on Rosh Hodesh Av, 5770, which is coming up very soon.

I created an Excel spreadsheet that explains this. I'm aware that there are those who say I'm a year off and put this milestone at 5771, so I'm open to all comments about this.

Update: The comments have convinced me that I am off by a year since the counting started in 5001 - not 5000. I modified the spreadsheet accordingly, but kept the original count on sheet 2.