Correction to my prior post, you will need to add 10 to the Day number
as well or you will end up with strange results for the first 9 days
of the month.

Also, although YEARDAY may not be appropriate because of leap years,
it gave me an idea on how you can do it.

select *
from MyTable
where Cast(Cast(Extract(Month from <timestamp field>)+10 as Char(2))
|| Cast(Extract(Day from <timestamp field>)+10 as char(2)) as Integer)
between :StartDateFormat and :EndDateFormat.

The date format you would need to use is

Month+10 together with Day+10

For example, to get all records between 3 Feb and 18 Jun:

select *
from MyTable
where Cast(Cast(Extract(Month from <timestamp field>)+10 as Char(2))
|| Cast(Extract(Day from <timestamp field>)+10 as char(2)) as Integer)
between 1213 and 1628

Of course this will hit need to read every record in MyTable, which
may not be pretty.

Adam