code:

%year%
    The year of the post, four digits, for example 2004 

 %monthnum%
    Month of the year, for example 05 

 %day%
    Day of the month, for example 28 

 %hour%
    Hour of the day, for example 15 

 %minute%
    Minute of the hour, for example 43 

 %second%
    Second of the minute, for example 33 

 %post_id%
    The unique ID # of the post, for example 423 

 %postname%
    A sanitized version of the title of the post (post slug field on Edit Post/Page panel). So “This Is A Great Post!” becomes this-is-a-great-post in the URI (see Using only %postname%). Starting Permalinks with %postname% is strongly not recommended for performance reasons.. 

 %category%
    A sanitized version of the category name (category slug field on New/Edit Category panel). Nested sub-categories appear as nested directories in the URI. Starting Permalinks with %category% is strongly not recommended for performance reasons. 

 %tag%
    A sanitized version of the tag name (tag slug field on New/Edit Tag panel). Starting Permalinks with %tag% is strongly not recommended for performance reasons. 

 %author%
    A sanitized version of the author name. Starting Permalinks with %author% is strongly not recommended for performance reasons