The music played at the beginning and end of this episode is also used in the role-playing video game Fallout 4 (2015), which also involves a group of people that have been cryogenically suspended to survive the apocalypse.
In the flashback, Abigail's (Sarah Grey) summer reading assignment is George Orwell's 'Animal Farm.' She and David Pilcher (Toby Jones) both quote from it.
The numbers 2319 can be briefly seen in the reflection of the word "PINES" shown in a neon sign with the letter N having been blacked out. This could possibly correspond to exodus 23:19
"The first of the first fruits of your land you shall bring into the house of the lord your God".
Which does fit in well with the theme of the episode quite nicely. Coincidence?