At Lughnasadh, the Wheel of the Year begins to shift from growing time to harvest time. The subtle changes of the waning sun that occurred at Summer Solstice becomes more evident as the balance of day and night seem to shift more dramatically. The slight seasonal changes in weather, and the declining arc of the sun, the southern movement of it rising and setting are other indicators of this shift. "After Lammas, corn ripens as much by night as by day."
Although temperatures can still be high, the mood and sensation of the year most decidedly changes. We enter the harvest time. It is the point in time when the first grains are collected and ritualistically sacrificed to ensure the continuance of the cycle of life both physically and spiritually.
In times past, fertility magic at Lughnasadh guaranteed the continued ripening of crops and bountiful harvest season. Festivities typically centered on the assurance of a plentiful harvest season and the celebration of the beginning of the harvest cycle. A bountiful harvest insured the safe passage of the tribe through the upcoming winter months. The gathering of bilberries is an ancient ritual symbolizing the success of the Lughnasadh rituals. If the bilberries were bountiful the crops would be also.