Only one answer per post please. If you have more then one solution, please make a separate post for each.
1024 B in a K = 1024 Bytes in a Kilobyte 
10^100:G
G=Googol 
365 Days in a Year ![]()
366 Days in a Leap Year 
299790000 (m/s): Speed of Light in Free Space 
93000000 Miles from the Sun 
1000 Years in a Millennium 
1 Horn on a Unicorn 
1066 Battle of Hastings 
1 Wheel on a Unicycle 
01 811 8055 Swap Shop (blimey that brought back memories!) 
1984 by George Orwell 
1969 First Man on the Moon 
42 the Answer to Life, the Universe & Everything (Hitchikers guide to the Galaxy) 
7 Brides for 7 Brothers 
2001 a Space Odyssey 
10 Years in a Decade 
1999 (Tonight I’m Gonna Party Like it’s…) 
12 Days of Christmas 