 
 <prompt> Wetin Witnesses dey do wen dem jam? Given di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Meetings for worship and study dey happun for Kingdom Halls, wey dey usually simple, and no get any religious symbols. Witnesses dey assigned to one congregation wey dey their area, and dem dey attend weekly services wey dem dey call "meetings" as congregation elders don schedule am. The meetings dey mostly focus on study of Watch Tower Society literature and the Bible. The format of the meetings dey come from the religion headquarters, and the subject matter for most meetings na the same worldwide. Congregations dey meet twice each week wey get five different meetings wey total about three-and-a-half hours, and dem dey gather for mid-week (three meetings) and for weekend (two meetings). Before 2009, congregations dey meet three times each week; but dem come reduce am, so that members fit dedicate one evening for "family worship". Gatherings dey start and end with kingdom songs (hymns) and short prayers. Twice each year, Witnesses from different congregations wey form one "circuit" dey gather for one-day assembly. Larger groups of congregations dey meet once each year for one three-day "regional convention", usually for rented stadiums or auditoriums. Their most important and serious event na the commemoration of the "Lord's Evening Meal", or "Memorial of Christ's Death" on the date of the Jewish Passover. 