awk '# date-month -- convert mm/dd/yy to month day, year

# build list of months and put in array. 
BEGIN { 
	listmonths="January,February,March,April,May,June,July,August,September,October,November,December" 
	split( listmonths,month,"," )
}

# check that there is input
$1 != "" {

# split on "/" the first input field into elements of array
	z = split($1,date,"/")

# check that only one field is returned
	if (z == 1)
		# try to split on "-"
		z = split($1,date,"-")

# must be invalid
	if (z == 1)
		exit

# add 0 to number of month to ensure numeric type 
	date[1] += 0

# print month day, year
	print month[date[1]], date[2]", 19" date[3] 
}' -