The number 28 symbolizes completeness and cyclical fulfillment, linked to the rhythm of life and God's order in creation.
In a biblical context, the number 28 is best known from Ecclesiastes (Predikeren) 3:1–8, where it lists 28 times – 14 pairs of opposites – expressing life's complete cycle under God's sovereign rule: a time to be born and a time to die, a time to plant and a time to uproot, and so on. The number also appears in connection with the tabernacle, where each curtain of the inner covering was to be 28 cubits long (Exodus 26:2), linking the number to the sanctuary and God's dwelling among His people. Furthermore, 28 is connected to the lunar cycle, which in traditional symbolism was rounded to 28 days, thus associating the number with time, renewal, and God's cosmic order. Additionally, 28 is a perfect number in the mathematical sense, a property that in Jewish and Christian numerology has been seen as an expression of wholeness and divine perfection. Altogether, the number 28 points to God's sovereign rule over time and life's complete cycle. The actual synodic month (from new moon to new moon) is about 29.5 days, but in symbolic and liturgical use, the cycle was often rounded to 28 days, providing a clean four-week division. A perfect number is a number where the sum of its proper divisors equals the number itself: 1+2+4+7+14=28. The first perfect numbers are 6 and 28. Church Father Augustine noted that God created the world in six days precisely because 6 is a perfect number, and 28 was similarly associated with perfection. The 28 cubit-long curtains of the tabernacle (Exod 26:2) have been interpreted in rabbinic tradition as a symbol of God's all-encompassing presence that covers and surrounds the sanctuary. In Kabbalistic tradition, 28 has been associated with the word כח (koach), meaning 'power' or 'strength', since the letters kaf (20) and chet (8) together give the numerical value of 28.*