*! datelab -- calculate date values for axis labels
*! version 1.0     Alan Riley, StataCorp     STB24: dm26
program define datelab 
        version 4.0 
        local i 0 
        global date0 
        while "${date`i'}"!="end" {
                local i = `i' + 1 
                di "date `i' ? " _request(date`i') 
                if "${date`i'}"!="end" { 
                        global date`i' = date("${date`i'}","mdy") 
                } 
        }
end