Every last digit in base ten is either a prime number or divisible by two. Creating a binary number out of this gives either 101011 (43, divisible by two->1, prime->0) or 010100 (20, opposite). Assuming the year is 2014, subtracting these gives the years 1971 and 1994.
In 1971:
- Intel releases the world's first microprocessor, the Intel 4004.
- Ray Tomlinson sends the first ARPAnet e-mail between host computers.
- The British postal workers' strike, led by UPW General Secretary Tom Jackson, ends after 47 days.
In 1994:
- March 14 – Apple Computer, Inc. releases the first Macintosh computers to use the new PowerPC Microprocessors. This is considered to be a major leap in personal computer, as well as Macintosh history.
- May 12 – Ice hockey becomes Canada's official winter sport.
- June 14 – Hacker Kevin Poulsen pleads guilty to 7 counts of mail fraud, wire and computer fraud, money laundering, and obstruction of justice.
This is probably all coincidence, but it's interesting.