The Somali calendar, ()، (سومَلي تِرو امّين) which is a

moon The Moon is Earth's only natural satellite. It Orbit of the Moon, orbits around Earth at Lunar distance, an average distance of (; about 30 times Earth diameter, Earth's diameter). The Moon rotation, rotates, with a rotation period (lunar ...

-and-

sun The Sun is the star at the centre of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light a ...

-based system, was used by Somali herders and farmers to determine the seasons and predict the weather. The Somali lunar calendar is known as ''dayax-tiriska'' (دَيَح تِرِسكَه) and the sun-based calendar is called ''amin-tiris'' (اَمين تِرِس) or ''shin-tiris'' (شِن تِرِس).

References

{{Calendars Culture of Somalia Specific calendars Time by country