没有2th这种表示方法，2nd才是正确的。第一1st，第二2nd，第三3rd，在第四的以后才是加th，如4th(forth),5th（fifth）。
2nd的含义
2nd就是英语second的缩写，意思是第二、指名次、日期等。
参考翻译：June 2nd 五月二日
例句：
June 2nd will be a red-letter day for him, he&39;s getting married.
六月二日是他的大喜日子，他要结婚了。
英文单词缩写
1-30号的英文单词缩写：
1st, 2ed, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th,
11th, 12th, 13th, 14th, 15th, 16th, 17th, 18th, 19th, 20th,
21th(u can say twenty first), 22th(twenty second), 23th( twenty third), 24th, 25th, 26th, 27th, 28th, 29th,30th, 31th
