The Somali calendar, (Somali: Soomaali tiro ammin)، (سومَلي تِرو امّين) which is a moon-and-sun-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).
Indigenous Week of Rendille
| The first day of the week | Hahat (هَهَت) |
| The second day of the week | Orra hakhan (اُورَّه هَخَن) |
| The third day of the week | Sere (سِرِه) |
| The fourth day of the week |
Kumat (كُمَت) |
| The fifth day of the week |
Sere hakhan (سِرِه هَخَن) |
| The sixth day of the week |
Sere adhi ( the day of sheep and goats ) (سِرِه اَطي) |
| The seventh day of the week |
Sere gaal (the day of camel) (سِرِه غَال) |
The Months and Seasons of the Somali Calendar
| Seasons | Months | Days |
1st day of the month |
Gregorian date |
| Xagaa حَغَا) , 13 weeks | Habis/Karan هَبِس/كَرَن) | 30 |
Habis/Karan 1 |
July 20 |
| Hala-lood/Habar-ari ( هَبَر اَري/هَلَه لود |
30 |
Hala-loodHabar-ari 1 |
August 20 |
| Diraacgood (دِرَاعغود | 30 |
Diraacgood 1 |
September 19 |
| Dayr, 13 weeks | Dayrweyn/Dambesame (دَير وِين/ دَمبِسَمبِه) | 31 |
Dayrweyn/Dambesame 1 |
October, 19 |
| Xoomir/Ximir (حومِر/حِمِر) |
30 |
Xoomir/Ximir 1 |
November 19 |
| Xays (حَيس) |
31 |
Xays 1 |
December 19 |
| Diraac, 13 weeks |
Aminla'/Lixkor (اَمين لهً/لِحكور |
31 |
Aminla'/Lixkor 1 |
January 18 |
| Adhi-caseeye (اَطي عَسِيَه) |
30 |
Adhi-caseeye 1 |
February 18 |
| Daydo (دَيدو) |
30 |
Daydo 1 |
March 20 |
| Gu’, 13 weeks + 1 |
Fushade/Seer-ma-waydo (فُشَدِه/سِير مَه وَيدو) |
31 |
Fushade/Seer-ma-waydo 1 |
April 19 |
| Cawl/Gu’soore (عَول/غُه سوره) |
30 |
Cawl/Gu'soore 1 |
May 20 |
| Dirir-Sagaalo (دِرِر سَغَالو) |
31 |
Dirir-sagaalo 1 |
June 19 |