Birth and/or Waneer notations?

P Livingston
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in Indexing
South Africa—Dutch Reformed Church Registers, 1660–1970 [Part D][M3FJ-1JQ]
I know to use the dates in the Wanneer column for membership, but when there is no date, except in the "Datum Afgele column, should I enter the information as a birth instead of church membership?
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