September 13

Fasting and obligatory prayer constitute the two pillars that sustain the revealed Law of God. Bahá’u’lláh in one of His Tablets affirms that He has revealed the laws of obligatory prayer and fasting so that through them the believers may draw nigh unto God. 
- The Universal House of Justice  (The ‘Notes’ section of ‘The Kitab-i-Aqdas’)