Hello Frank,
According this site Helena was baptized in Nederweert on March 1, 1779:
fasol.nl/tng/getperson.php?personID=I272092&tree=fasol (opent in een nieuw tabblad)
No direct link to a source.
I looked up the baptism book of Nederweert, that should be of the St. Lambertus Parish, but could not find a baptism record on this date.
archieven.nl/nl/zoeken?mivast=0&mizig=210&miadt=38&miaet=1&micode=11.01&minr=18334637&miview=inv2 (opent in een nieuw tabblad)
Check scan #11 - Text is in Dutch and mentions both birth date and baptism date of each child.
There is a baptism on February 28 and the next one on March 7.
However, I also noticed this site with a peculiar list of names:
genealogieonline.nl/stamboom-pirovano/_gendex.txt (opent in een nieuw tabblad)
and there it says:
I1972.php|VAN RIET|Helena/van Riet/|01 AUG 1779|Nederweert|02 DEC 1828|Soerendonk|
In the same baptism book I do not find a baptism of Helena van Riet on or around August 1 (scan # 17 & 18).
There is a Helena being baptized on or just after July 23, but this doesn’t seem to be Helena van Riet (can’t read the tekst very well).
But at least it seems that the birth/baptism day must be found in 1779.
With regards,
Belem