kàn dào gōng zuò rì jiǔ diǎn dào shí bā diǎn, tōng cháng bù bāo kuò zhōu mò hé fǎ dìng jié jià rì

看到“工作日九点到十八点”，通常不包括周末和法定节假日。

When you see 'weekdays 9:00 to 18:00', it usually does not include weekends and legal holidays.