Metric TimeThe day is divided into 100 parts (centidays) and the time is given to three decimal places. Think of it as a percent of the day that has passed. Midday will be 50.000 LMT (Local Metric Time) in metric Time. 
How many full hours are left until the end of the year?? 
Mayan Time
The Mayans used a vigesimal (or base20) numeral system. Mayan numerals use only combinations of dots (ones) and bars (fives) to form numerals for 1 to 19, and a stylised shell glyph for zero (not shown here). 

Hexadecimal TimeThe day is divided up into 65536 parts and written in hexadecimal (base16) notation (A=10, B=11 ... F=15). The "0x" at the begining is just to signify that it is in hexadecimal notation, we could just leave it off or use some other signifier. 

Binary TimeLike hexadecimal time, the day is divided into 65536 parts, only we display it as a binary number using squares for bits, here using dark squares to represent 1 and white for 0. 
Octal TimeOctal Time uses a base8 system (digits 07). The day is divided into 32768 parts for a total of 5 octal digits. The rightmost digit updates about every 2.6 seconds (half the speed of hexidecimal time). 
Base 64 TimeBase64 uses ASCII characters (in ascending order: AZ, az, 01, +, and /). Can you figure out how you would convert Base 64 time to mormal time? 
The many digital clocks used on this page are adapted from the work of Lyle Zapato
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Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments: Transum.org/go/?Start=October21 However it would be better to assign one of the student interactive activities below. 

Here is the URL which will take them to a related student activity.