日期字段{周开始日期}存储每周开始的日期，日期字段{周结束日期}存储每周结束的日期，且设置计算公式为calcDate({周开始日期},6)。
假定数字字段{周}存储本月第几周，则以下为计算本月第几周的公式。
注意：下述公式中，{周开始日期}只能填写星期日或星期一！
如果 | (weekday({周开始日期})=0 and day({周开始日期})>=26 and day({周结束日期})>=4) or (weekday({周开始日期})=0 and day({周开始日期})<=4) or (weekday({周开始日期})=1 and day({周开始日期})>=27 and day({周结束日期})>=5) or (weekday({周开始日期})=1 and day({周开始日期})<=5) | 则为 | 1 |
如果 | (weekday({周开始日期})=0 and day({周开始日期})>=5 and day({周开始日期})<=11) or (weekday({周开始日期})=1 and day({周开始日期})>=6 and day({周开始日期})<=12) | 则为 | 2 |
如果 | (weekday({周开始日期})=0 and day({周开始日期})>=12 and day({周开始日期})<=18) or (weekday({周开始日期})=1 and day({周开始日期})>=13 and day({周开始日期})<=19) | 则为 | 3 |
如果 | (weekday({周开始日期})=0 and day({周开始日期})>=19 and day({周开始日期})<=25) or (weekday({周开始日期})=1 and day({周开始日期})>=20 and day({周开始日期})<=26) | 则为 | 4 |
如果 | (weekday({周开始日期})=0 and day({周开始日期})>=26 and day({周结束日期})<4) or (weekday({周开始日期})=1 and day({周开始日期})>=27 and day({周结束日期})<5) | 则为 | 5 |
否则为 | 0 |