While the validity is noted in months, these are not Western months but lunar months, and you need to use the Islamic calendar to figure out the length: a three-month visa issued on "29/02/22" (22 Safar 1429, 1 March 2008) is valid until 29/05/22 (22 Jumada al-Awwal 1429, 28 May 2008), not until 1 June 2008!
In kasta oo ansaxnimada lagu xusay bilo, kuwani maahan bilo reer Galbeed ah laakiin bilaha dayaxa, waana inaad adeegsataa jadwalka taariikhda Islaamka si aad u ogaato dhererka: fiiso saddex bilood ah oo la soo saaray "29/02/22" (22 Safar 1429, 1 March 2008) waxay soconaysaa illaa 29/05/22 (22 Jumada al- Awwal 1429, 28 Meey 2008), ma illaa 1 Juun 2008.