This FamilySearch record might be a better source. It does not states de day of the month:
Name: Samuell Sebbrookel
Gender: Male
Christening Date: Jun 1608
Christening Place: TRING,HERTFORD,ENGLAND
Father's Name: Robart Sebbrookel
Indexing Project (Batch) Number: C02025-1
System Origin: England-ODM
GS Film number: 91766
Citing this Record:
"England Births and Christenings, 1538-1975," database, FamilySearch (
https://familysearch.org/ark:/61903/1:1:J734-48Y : 30 December 2014), Samuell Sebbrookel, Jun 1608; citing TRING,HERTFORD,ENGLAND, reference ; FHL microfilm 91,766.