Try this out 🙂
DATETIME_PARSE(
IF(DATEADD(DATETIME_PARSE(DATETIME_FORMAT({Date Field},'YYYY-MM')&'-10'), 2, 'days')>DATETIME_PARSE({Date Field}),
DATETIME_FORMAT(DATEADD(DATETIME_PARSE(DATETIME_FORMAT({Date Field},'YYYY-MM')&'-10'), 2, 'days'), 'M/DD/YYYY'),
DATETIME_FORMAT(DATEADD(DATETIME_PARSE(DATETIME_FORMAT({Date Field},'YYYY-MM')&'-10'), 9, 'days'), 'M/DD/YYYY')
)