According to sources cited in Seder Hadorot, Tevet 28 is both the birthday and the day of passing of Shimon the son of Jacob; other sources place the date as Tevet 21. (See the entry for Tevet 21).
Shimon ben Shetach successfully completed the expulsion of the Sadducees (a sect which denied the Oral Torah and the authority of the Sages) who had dominated the Sanhedrin (Supreme Court), replacing them with his Torah-loyal disciples, on the 28th of Tevet of the year 3680 from creation (81 BCE).
Rebbetzin Chana Schneerson (1879 (O.S.) - 1964), mother of the Lubavitcher Rebbe, was born on Tevet 28.
Know as clear as day and contemplate this deeply, that He who emanates all into being is He who rules and judges this world. In the heavens above and on the earth below, there is nothing else. (Deut. 4:39)
The same G‑d who transcends all time and space is the same G‑d manifest in all the forces and fields of physics.
The same G‑d from whom all existence emerges is the same G‑d who conceals that truth from every conscious being, providing space for each one to be that which it is.
The same G‑d from whom all life extends is the same G‑d who restrains that energy, with kindness, so that finite creatures can exist, to the tiniest worm hiding in the bowels of the earth.
And when you know all this, and you contemplate it well…
…that the very substance of each thing is nothing more than an articulation of divine energy, that even time and space extend from Him at will, as do the very limitations and sense of existence of each creation, that darkness is His presence as much as light, hiddenness as is revelation, matter as is energy, somethingness as is nothingness, for He is both beyond and within each place, moment and thing…
…then you will know that there really is nothing else. Nothing else but the one G‑d.
As the Baal Shem Tov would say in simple, succinct form: Divine energy is all there is, and everything is divine energy.