January.1699前面用in,还是on

January.1699前面用in,还是on JANUARY 用IN还是ON 是On January还是In January 英语翻译应该是In 1943 January还是In January ,1943 为什么? on January还是in January,前面用什么借此,还有就是年份（如new year、2009年）前面用什么借词,时间（如8 o'clock）前面用什么借词,星期几（Monday）前面用什么借词,还有at和in、on怎么区分?具体点! On January 2011对吗?是用on 还是in? 是on January,2010还是in January,2010? 是In January 1,1999还是On January 1,1999 月份前用的是什么 介词 in 还是 onI was born on January eleventh.It's so cold in January. The first month_____ a year is January.是用 in 还是of?还是两者都可以? my brother was born （ ） the morning of January 1 用in还是on? 一句话：The best time to visit China is (in January还是January)帮帮忙 ( )comes after june and before August前面应填juiy还是may还是March还是january His birthday is-----------------january,中间是in还是on, Spring Festival is in January是对还是错? holiday前面用on还是用in 年份前面是用on还是in? China前面用in on 还是at