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Rocket clouds
Calendars by Mind Map: Calendars

1. Earth

1.1. spins round in 24 hours

1.2. moon around the earth

1.3. earth round the sun

1.3.1. 365.25 days

2. Days & weeks

2.1. Seven days because there are 7 planets

2.1.1. Venus

2.1.2. Mercury

2.1.3. Mars

2.1.4. Jupiter

2.1.5. Saturn

2.1.6. Sun

2.1.7. Moon

2.2. Sun -> Sunday

2.3. Moon -> Monday

2.4. Saturn -> Saturday

2.5. Tiw -> Tuesday

2.6. Wodin -> Wednesday

2.7. Thor -> Thursday

2.8. Frigg -> Friday

3. Months

3.1. Janus -> January

3.2. A Roman festival of spring cleaning -> February

3.3. Mars -> March

3.4. Juno -> June

3.5. septem (seven) -> September

3.6. octo (eight) -> October

3.7. nove (nine) -> November

3.8. decem (ten) -> December

3.9. Julius Caesar -> July

3.10. Augustus Caesar -> August

4. Julius Caesar' calendar

4.1. Much Simpler than the old one

4.2. Only 11 min. & 14 sec. a year too slow

4.3. Augustus corrected Julius' calendar

5. Augustus' corrected calendar

5.1. Only 11 min. a year too slow

5.2. 11 min. too slow became quite a lot

5.2.1. had to take 10 days to catch up

5.2.2. from 4 to 15 October