I just found this question, on which the OP asked the meaning of 差一刻九点. The answer is "a quarter to nine".
Now I wonder how you can express "a quarter past nine" in Chinese? The first thing I came up with is 过一刻九点, but is it correct?
Also, is there any variations by region?
九点一刻 is 9:15 - but more often you'd just heard/use 九点十五分.
差一刻九点 is okay, but again more likely you'd just heard/use 八点四十五。
To add to the accepted answer, at least in Southern Malaysia and Singapore, we also use the pattern H点N个字 where H is the hour and N is the number that the minute hand is pointing to. For example, 九点一个字 means 9:05, 三点五个字 means 3:25. Exceptions are the 0 and 30 minute.
In the casual situations, I would say like 九点十五, 九点零四， 八点二十， 四点半(never say 四点半分)， 三点四十，两点（整）。
九点一刻 or 九点三刻 sounds a little bit formal than 九点十五 or 九点四十五.
分 is omitted most of time and 九点十五分 sounds a bit formal, for you are trying to be accurate.
But if you add 秒, you should not omit anything, like 九点十五分三十六秒, not 九点十五 三十六.
As for 'a quarter to nine', it's usually put 差一刻九点, 差十五分钟九点，还有十五分钟九点， 还有一刻钟九点
