Duplicate this page before you start, and write your answers in your own copy.

🎂 1. When is your birthday?

✍️ Write here, on your own.

1. When does your birthday actually happen?

2. If you were born at midnight, which day is your birthday?

3. If you were born in Australia and moved to the UK, do you celebrate on the same calendar day, or 24 hours after the moment you were born?

4. What about people born on 29 February?

Even something as "simple" as a birthday involves arbitrary human decisions about how to divide time

🌈 2. Where does orange end?

Spectrum Symphony Color Palette - ColorDrop

1. Look at the colour gradient. Where does red become orange, and orange become yellow?

2. Compare where you put the lines with the people around you.

3. Other languages divide colours differently:

   All The Colours, Including Grue: How Languages See Colours Differently

   • Russian: separate words for light blue (goluboy) and dark blue (siniy)

   • Japanese: historical 'ao' covered both blue and green

     Why are Traffic Lights Blue in Japan? - JapanUp! magazine

   • Welsh: 'glas' covers blue, green, and grey

     The Welsh Word for Blue: Glas - We Learn Welsh

   • In many languages, the colours described in English as "blue" and "green" share a single umbrella word.

✍️ Write here, on your own.

1. Where did you put the boundaries, and did others agree?

2. Do speakers of these languages see colours differently, or just label them differently? How could we find out?