Of course Huang-xiang and his father were both very sad. But little Huang-xiang was especially sad to see his father mourning day and night.

当然黄香和父亲都很难过，但令小黄香分外难过的是看到父亲夜以继日的悲伤。

youdao

The government announced a day of national mourning for the victims.

政府宣布全国为受害者哀悼一日。

《牛津词典》

I am troubled; I am bowed down greatly; I go mourning all the day long.

我疼痛，大大拳曲，终日哀痛。

youdao

Sunday was a day of mourning as grieving relatives of the victims crowded the local hospital to identify the victims.

VOA: standard.2010.05.23

She says people are still living with that mourning, and September 28 should always be a sacred day.

VOA: standard.2009.10.28

Opposition leaders Mir Hossein Mousavi and Mehdi Karroubi called for a day of mourning and had urged supporters to come to the funeral.

VOA: standard.2009.12.22

"This is not only a day of mourning, but a day to renew our resolve to rebuild, " he said.

WSJ: Japan Marks One-Year Anniversary of March 11 Earthquake and Tsunami

The Kenyan government announced an official five-day mourning period for victims of the bombing and ordered flags lowered to half staff.

CNN: Rescuers search for life in rubble of Nairobi bomb attack

Normally, after a pope dies, there is a nine-day mourning period before the start of the selection of a new pope.

WSJ: Pope Benedict XVI to Resign