MakeFeatureLayer_management wrong output

I have a huge database with Sightings from whales and dolphins from 1995 till today.
So I want to sort the database with python.

Till now I can make FeatureLayers for each year

for year in range(1995,2014):
arcpy.MakeFeatureLayer_management
(“Sightings95-14″, “test%s” % year, “DATE >= date’01.01.%s’ AND DATE < date’01.01.%s’” % (year, year+1))

now I want to sort it into each month (no matter of the yaer), because there are way more sightings in may than in december for example.

If I excecut this code:

for month in range (01,12):
arcpy.MakeFeatureLayer_management
(“Sightings95-14″, “test%s” % month, “DATE >= date’01.%s.1995′ AND DATE < date’31.%s.2014′” % (month, month+1))

it makes the 12 FeatureLayers but in each Layer is the hole database included so he did not “sort” it right.

What is my mistake ?