"今天星期六。"

Translation: Today is Saturday.

[stephleest]

I'm confused about when to use the verb 是 when talking about dates and days of the week. Can it pretty much be omitted?

[eleamira]

"是 is nessecary when you have a sentence that is logically A=B, and A and B are both nouns ... it is not necessary when you have a noun followed by an adjective."
http://chinesepod.com/community/conversations/post/12767

Here's another explanation from fluentu:
https://www.fluentu.com/blog/chinese/2015/07/09/shi-chinese/

[phb2013]

Thank you, Liralle. I've been trying to figure out when and when not to use "shi" for a long time. The second link you provided explains it particularly well. Much appreciated.

[Gelukservaring]

The second link gives excellent information, but it still does not turn Saturday into an adjective. At least not in English.

[p40sZFlP]

Why use Liu (6)...
Are the days of the week numbered, instead of named???

[sahar-rabayev]

why is Saturday the 6 day (as it seems implied by the sentence)?

[phb2013]

I guess because in China they consider Monday the first day of the week, instead of Sunday. That then makes Saturday day six.

[MaartenVer292295]

Where do they consider Sunday the first day of the week? I thought all Christian countries considered Sunday the Holy seventh day...

[phb2013]

Here's a link you might find interesting: http://www.answers.com/Q/Is_Sunday_the_first_day_of_the_week

[Polina724594]

why is there 6 in the end