first第一
second第二
third第三
fourth第四
fifth第五
sixth第六
seventh第七
eighth第八
ninth第九
tenth第十
eleventh第十一
twelfth第十二
thirteenth第十三
fourteenth第十四
fifteenth第十五
sixteenth第十六
seventeenth第十七
eighteenth第十八
nineteenth第十九
twentieth第二十
twenty-first第二十一
twenty-second第二十二
twenty-third第二十三
twenty-fourth第二十四
twenty-fifth第二十五
twenty-sixth第二十六
twenty-seventh第二十七
twenty-eighth第二十八
twenty-eighth第二十九
thirtieth第三十
thirty-first第三十一1st,2nd,3rd,4th,5th,6th,7th,8th,9th,10th,11th,12th,13th,14th,15th,16th,17th,18th,19th,20th,21st,22nd,23rd,24th,25th,26th,27th,28th,29th,30th,31st.