returns a 'true' boolean if value is date
returns a 'true' boolean if date is january
returns a 'true' boolean if date is february
returns a 'true' boolean if date is march
returns a 'true' boolean if date is april
returns a 'true' boolean if date is may
returns a 'true' boolean if date is june
returns a 'true' boolean if date is july
returns a 'true' boolean if date is august
returns a 'true' boolean if date is september
returns a 'true' boolean if date is october
returns a 'true' boolean if date is november
returns a 'true' boolean if date is december
returns a 'true' boolean if date is current year
enum containing months
returns a 'true' boolean if date is current month