Swahili Clock Time

In East Africa, time is measured in two 12-hour cycles starting at sunrise (6:00 AM) and sunset (6:00 PM). Because the sun rises and sets around 6:00 year-round on the equator, the first hour of the day is 7:00 AM, which is called saa moja asubuhi (hour one of the morning). The clock resets at sunset, meaning 7:00 PM is also hour one (saa moja usiku).

To ask "What time is it?", use Saa ngapi? or Ni saa ngapi? (literally: How many hours?). The word ngapi is formed from the root -ngapi (how many). The N-class plural prefix drops or assimilates before the ng- sound, leaving it as ngapi to agree with the N-class plural noun saa (hours). Note that the word saa also literally translates to "clock" or "watch" in addition to "hour".

To convert Western time to Swahili time, simply add or subtract 6. For example, 8:00 AM becomes 2:00 in Swahili time (saa mbili). Note that 5:00 and 6:00 (Western time) translate to 11 and 12 in Swahili time: saa kumi na moja and saa kumi na mbili. Alternatively, look at an analog clock and read the number directly opposite the hour hand.

The basic structure is:

• saa + number + time of day

Since Swahili time relies entirely on these specific numbers, here are the numbers 1 through 12:

• 1: moja
• 2: mbili
• 3: tatu
• 4: nne
• 5: tano
• 6: sita
• 7: saba
• 8: nane
• 9: tisa
• 10: kumi
• 11: kumi na moja
• 12: kumi na mbili

Swahili does not have direct equivalents for AM and PM. Because it is a 12-hour clock, it is highly recommended to specify the time of day to act as direct replacements for AM/PM and avoid confusion:

• alfajiri (early morning/dawn)
• asubuhi (morning)
• adhuhuri (noon/midday)
• mchana (afternoon)
• alasiri (late afternoon)
• jioni (evening)
• usiku (night)
• usiku wa manane (late night/dead of night)

For exact hours, minutes, and fractions, use kamili (exactly), na (and), dakika (minutes), or kasoro (less/minus):

• kamili (exactly/on the dot, e.g., saa mbili kamili)
• na nusu (half past)
• na robo (quarter past)
• kasorobo (quarter to - this is a portmanteau literally meaning "less a quarter" from kasoro + robo. Note that you state the approaching hour, but the word order is opposite to English: hour + kasorobo)
• kasoro dakika (less minutes). When expressing minutes to the hour, you state the approaching hour and subtract the minutes (e.g., saa mbili kasoro dakika kumi for 10 minutes to 8)
• na dakika (for specific minutes, e.g., saa mbili na dakika tano)

Approximate Parts of the Day:
In ordinary Western-clock terms, alfajiri is around dawn, asubuhi the morning, adhuhuri around noon, mchana daytime/afternoon, alasiri later afternoon, jioni around evening and usiku night. As rough orientation, think dawn around 5–6, morning around 6–12 and evening around 6–7 p.m.; boundaries vary with place and context. These labels are not mathematically fixed hour blocks or exact substitutes for a.m./p.m.