1.
From January 1st to February 1st is one calendar month.
从一月一日到二月一日是一个历月。
2.
The project was terminated as of January 1.
该项目于一月一日竣工
3.
The holidays last from the first day of January until the last day of December!
从一月一日到十二月最后一天都是假日
4.
April fool
愚人节(四月一日)
5.
The examination will be held on Oct. 1 and 2.
本学期考试日期为：十月一日、十月二日。
6.
Children's Day is always the first of June.
儿童节一直是六月一日。
7.
Children have a day off on June 1.
六月一日儿童放假一天。
8.
May1, the day on which this feast was held.
五朔节日五月一日，该节日举行的日子
9.
Period of time from a certain date in one month to the same date in the next one
从某月某日至下月同一日的期间
10.
Schools give a vacation from July 12 to September 1.
学校自七月十二日到九月一日放假。
11.
The date of the meeting was advanced from July 10 to July.
会议已从七月十日提早到七月一日。
12.
if there is no corresponding day in that month, the time limit shall expire on the last day of that month;
该月无相应日的，以该月最后一日为期限届满日；
13.
April 1st is April Fool's Day.
四月一日是愚人节。
14.
June 1st is Children's Day.
六月一日是儿童节。
15.
June the first is International Children's Day.
六月一日是国际儿童节。
16.
All the best! Zhao Shaoxiong That was on the front of the page.
赵少雄 一月二四中日”
17.
Xinhua News Agency, Beijing, January 5, by wire
新华社北京一月五日电
18.
The meeting opened on April lst.
会议四月一日开幕了。