[Selenium] Xpath Drop Down Use Variable

[digitalmatic7]

I wanted to have a variable (random number between 1 and 12) used for my drop down option value..

So instead of value='05' it would be something like value='month', value='day'

Unfortunately it doesn't work. What are my options?

driver.find_element_by_xpath("//SELECT[@name='month']/option[@value='05']").click()
driver.find_element_by_xpath("//SELECT[@name='day']/option[@value='01']").click()

PS - the numbers must be formatted like 01, 02, 03, 04, 05, 06 etc rather than 1, 2, 3, 4, 5