The hats and booties I'm knitting now will be mailed USPS Priority Mail on February 9th to ensure they arrive by Valentine's Day the following week.
Other mailing dates I've decided on are:
April 2 for Easter (April 8th) and spring
June 29 for Fourth of July and summer
October 26 for Halloween and autumn
December 19 for Christmas and winter
I haven't chosen the recipient hospitals as yet.