Waking up the neighbours: Indonesia's Ramadan dawn alarm clocks
The motley group of children yell and bang on tambourines and drums as they roam the quiet streets of Indonesia's capital on a mission to stir sleeping residents for a pre-dawn meal.
It is Ramadan and millions across the world's biggest Muslim-majority nation are abstaining from eating, drinking, smoking or intercourse during daylight hours.
The morning meal, known as Suhoor, can be crucial to making it through until sunset without food or drink.
"Suhoor! Suhoor! Please wake up sir, madam!" holler the 20-strong group of kids, aged seven to 15.
It's music to the ears of dozens of other children who stream out of their houses to join in, adding the thump of empty paint cans and water jugs to the ensemble.
"This tradition has been around for a long time - every kid is happy to do it," said 13-year-old Ramadin.
"I like it because this not only entertains people, but also helps them wake up for the pre-dawn meal."
Their entertainment value is probably a matter of debate.
But many of the kids are part of a Quran study group run by the local mosque which has given its blessing to this midnight madness.
Complaining would be futile.
"They are indeed noisy, but it helps me wake up on time," offers local resident Rosimah, who like many Indonesians goes by one name.
"We are used to it - happens every year," she added.
Most of the Jakarta group's members are known as local troublemakers so conscripting them into religious service is a win-win situation for the neighbourhood - and the mosque.
"Many of these kids have dropped out of school. Some never even went to school. They are unemployed and became street children who cause trouble," Alvanali Panji Prasetyo, an Islamic teacher and group leader, told AFP.
"Thanks to God, the kids are starting to change their attitude after joining the group."
Smartphone alarms and digital clocks have seen this wake-up tradition gradually decline over the years.
But it is still found across the sprawling Indonesian archipelago - especially in smaller communities - which is home to about 260 million people. Nearly 90 percent are Muslim.
Similar wake-up traditions are also practised in some other Muslim nations during Ramadan, which ends in mid-June.
Palestinians in Jerusalem's Old City also take part in the tradition despite facing challenges by Israeli authorities.
Security forces detained the three musaharatis or dawn awakeners earlier this month before releasing them under the condition they would stop waking people up for pre-dawn meals.
The group were arrested after Israeli settlers complained the men were creating a disturbance, one of the men told The New Arab's Arabic-language service.
Agencies contributed to this report