Going to sleep no more than an hour later or waking up no later than 2 to 3 hours longer than you would usually do during the week.

周末的时候，睡觉时间不能比平时晚一小时以上，起床时间不能比平时晚超过2到3小时。

youdao

Girls are advised to begin testing within three years of when they first have sex, or in any case no later than twenty-one.

VOA: special.2009.11.25

New presidential elections are expected no later than June 20.

VOA: standard.2010.04.10

Nominations must be submitted electronically through: www.fwis.fr no later than Sunday 15 June 2014.

UNESCO: 2015 L��OREAL-UNESCO International Women in Science Awards

Then Congress is supposed to act on those recommendations by no later than next June.

NPR: Medicare Money Problems Trigger Warning

Dana said it would make a detailed response to the offer no later than 8 September.

BBC: Bid target Dana Petroleum sees profits soar by 274%