一个假日

今天是假日。
Today is holiday.
（question: which one is better? this:今天是一个假日。 or the one above?）

Better to say “今天放假”

现在下午三点一刻。
Now it's a quarter past three in the afternoon.

(question: Is it right to say： 现在是3:15p.m。 or 现在3:15p.m。？ which one is better?) Both right
(What is the meaning of 差 when it's used for saying the clock? for example:
现在差下午三点一刻。) “差” means "to" in English, for example: it's quarter to 10 now, in Chinese it's “现在差一刻十点”

我今天起床早上六点了。
Today I woke up at 6 a.m.

今天早上我六点起（的）床。 actually without “的” is correct but we usually put a "的" there...

早饭以后，我帮我的父亲清洗他的车了还帮母亲清理房间了。
After breakfast, I helped my father to clean his car, also helped mother to tidy up the room.

早饭之后，我帮父亲洗了车，还帮母亲清理了房间。

我的房间荧光灯坏了，父亲修好它了。 Perfect!
The fluorescent lamp of my room was broken down, and my father repaired it.

我也可以修好它了，因为它需要一个崭新的启动器了！
I was able to repair it too, because it just needed a new starter!!

我也能修好它，因为它只是需要重新安一个启动器！

一个假日

今天是假日。 如果只是周末，我们从来不说假日，而是说：今天是周末。或者，今天是休息日。
Today is holiday.

（question: which one is better? this:今天是一个假日。 or the one above?）

现在下午三点一刻。
Now it's a quarter past three in the afternoon.

(question: Is it right to say： 现在是3:15p.m。 or 现在3:15p.m。？ which one is better?)
(What is the meaning of 差 when it's used for saying the clock? for example:
现在差下午三点一刻。)

1、现在差一刻下午三点 means 2：45PM。

and ，现在三点四十五 means：3：45PM。

2、口语和写作，从来不说 现在3：15PM。

我今天起床早上六点了。 今天我早上六点起床。
Today I woke up at 6 a.m.

早饭以后，我帮我的父亲清洗他的车了还帮母亲清理房间了。 饭之后，我帮爸爸洗了车，还帮妈妈清理了房间。
After breakfast, I helped my father to clean his car, also helped mother to tidy up the room.

我的房间荧光灯坏了，父亲修好它了。 我的房间荧光灯坏了，我爸爸也把它修好了。
The fluorescent lamp of my room was broken down, and my father repaired it.

我也可以修好它了，因为它需要一个崭新的启动器了！ 我也会修，其实也就是换一个新的启动器。
I was able to repair it too, because it just needed a new starter!!