It is on August 1st.为什么1st后面不用加the?

It is on August 1st.为什么1st后面不用加the? The PLA was founded on August 1st.中文? 根据文章的首字母完形填空（英语）My summer holiday is in July and August.It b____ on 1st July and ends on 31st August.D____ my holiday,I am going to be very busy.In the afternoon,I will take my mother for a walk.After that,I will go to John's birthday is August 1st.(改为一般疑问句) August 1st 还是August 1 英语8月1日,2008怎么说?on August 1st,1927和on August 1,1927哪个对? on August 1,1927与on August 1st,1927的区别The People's Liberation Army was founded _______.A.on August 1,1927 B.in 1927,1 August C.on August 1st,1927 D.in August 1,1927请问选什么？ When is H ___?It is on October 31st John's birthday is August 1st改为一般疑问句是什么 -When is the Nation Dayof the PRC?-It's________.A.on 1st October B.in 1st OctoberC.on 1st of the October D.in the 1st of October什么时候用in?什么时候用on? the people's liberation army was founded___.A on August 1,1927 B on August 1st ,1927 选哪个,哪个错在哪 It is on September 1st _____ students go back to school every year. It is （ on）May 1st.翻译成汉语是什麽意思 Tony s birthday is ____May.It s____May 1st.用on,in,at (C )Day is on June 1st. Children’sDay is on（）1st Fools’sDay is on（）1st ---When is the National Day of the PRC? ---It's _____.A on 1st October B in 1st October C on the 1st of OctoberD in the 1st of October