在Python中搜索部分搜索查询时，解释用户输入的日期？

Question

我正在寻找一种搜索算法来解析搜索查询字符串中的日期：

例如

query1 = "2014 phone"
query2 = "Blue Sky May 3, 2013"
query3 = "Telephone equipment 6/7/2004"

将被解释为：

string1 = "phone"
year1 = "2014"
month1 = ""
day1 = ""

string2 = "Blue Sky"
year2 = "2013"
month2 = "05"
day2 = "03"

string3 = "Telephone equipment"
year3 = "2004"
month3 = "06"
day3 = "07"

在Python中执行此操作的最佳方法是什么？