24 Oras premiered on March 15, 2004 at 6:15pm, replacing Frontpage: Ulat ni Mel Tiangco as the network's answer to longest-running newscast TV Patrol. Frontpage anchor Mel Tiangco was joined by Saksi's Mike Enriquez, rejoining them in one newscast since they co-anchored Saksi from 1996 to 1998. Special weekend editions are also being aired when it deemed necessary (See below). The show, meanwhile, transferred its timeslot from 6:15pm to 6:30pm, it was currently extended to 90 minutes.
On June 2004, along with Saksi, the show relaunched its studio set, and graphics packages, and later in September 2004, the show was listed top 10 from the AGB Nielsen TV Ratings, leading 24 Oras, the most-watched primetime newscast.
On December 1, 2005, the coverage by 24 Oras of a siege of Camp Bagong Diwa was mentioned in the best news program category in the Asian Television Awards in Singapore.
The show relaunched in April 17, 2006 with a new graphics package, and a new set with floating large rear projection screens that allow the anchors to virtually "talk" to correspondents in live feeds, also the anchors are doing stand-up news delivery. The studio set was shared by Saksi during that time. PAGASA's Nathaniel Cruz anchors weather news during severe weather conditions.
On August 11, 2008, the show was relaunched again with a multi-million peso studio set using LED, a new desk which is identical to the desk used by CBS Evening News, new graphics, new titles, and its new slogan "Tahanan ng Katotohanan". On April 2010, the show became the home of Vizrt Touchscreen system a real-time broadcast solutions system which is used in the YouScoop segment designed and developed by GMA New Media.
24 Oras became instrumental and controversial on covering the 2010 Manila hostage crisis, the authorities ordered a media blackout, but failed, when covering live the arrest of the brother of the hostage-taker, the hostage-taker was apparently monitoring GMA-7 and found out about it; the situation became worse when gunshots were heard inside the bus assuming that the hostage taker was watching, it monitored the SWAT's movement of the rescue, the massacre ended at least one hour, when the hostage taker was shot dead on live TV, due to teargas that choked the bus. The coverage ate up its primetime block, from 6:30-9:30pm, giving 19.7% of its audience share from AGB Nielsen.
On December 6, 2010, the news program updated its graphics. A day later, it updated its OBB and title card. On February 21, 2011, along with Unang Hirit, Saksi, and GMA Flash Report, the newscast transferred its new studios, Studio 5; launched new graphics, new theme, and new OBB. The new theme music is a remix of 24 Oras 2008-2011 theme music & an element of an opera voice, eventually it was developed in 2010.
On October 10, 2011, 24 Oras updated only its graphics. This also use a new font Antique Olive on their graphics, replacing Myriad font, which is used on other GMA newscasts.
On June 4, 2012, 24 Oras launched its new weather segment titled I.M. Ready: GMA Weather (based on the advisory advertisement of the said title, and the branding of I.M. Ready). On June 2013, 24 Oras introduced its augmented reality graphics, initially used at the beginning of the show for presentation/demonstration purposes. It is currently used for US Dollar exchange rate, Metro Manila air index, some live crosses and for other occasional purposes (such as Christmas/New Year Countdowns and demographics/data gathering in connection of a certain news story).
A notable coverage of GMA News for "Super Typhoon Yolanda", covering the devastating Typhoon Haiyan (international name), won its 4th George Foster's Peabody Awards in 2014.
On November 10, 2014, as part of GMA News' shakeup, Vicky Morales joined the 24 Oras team as its third anchor. Also, GMA Regional newscasts for Bicol, Cebu, Davao, Northern Mindanao, Iloilo, Dagupan and Ilocos adopted the 24 Oras branding. Along with Saksi and Balitanghali, a flat graphic package introduced, and a new title cards, the return of the Myriad font for 24 Oras and the OBB, along with its energetic theme music. All of these changes are answers to competition of its long-time rival, ABS-CBN's TV Patrol.
On April 24, 2015, with GMA Network's plans of streamlining regional operations, the Ilokano, Bikol and Northern Mindanao editions were axed by the management, followed by the Iloilo (Ratsada 24 Oras) edition on November 13. All of its news staff were laid off of business and were given severance pay to those affected. On February 1, 2016, North Central Luzon (24 Oras Amianan) and Central Visayas editions of the newscast reverted to their respective titles: Balitang Amianan and Balitang Bisdak, respectively. With the said downgrade, the Southern Mindanao edition (rebranded since October 3, 2016 as 24 Oras Davao) became the only regional edition of the newscast across the entire network. In addition, GMA also axed its remaining local non-news programs for its regional viewers.
After 11 years of delivering showbiz news on Chika Minute, Pia Guanio bid farewell to 24 Oras to concentrate on her family life. Iya Villania took over as the new Chika Minute anchor on June 15, 2015.
On mid-November 2016, a new 24 Oras logo was unveiled on a billboard on the side of the GMA Network Center. The said logo was first used on-air along with a new graphics, OBB, and theme song package on December 5, 2016, retiring the stylized clock logo which was in use since 2004. A new fontface, DIN, has been introduced and is used alongside Myriad, and now uses augmented reality graphics more extensively to rival those of TV Patrol's.
Before the launch of the weekend edition, 24 Oras occasionally appeared on weekends during special coverages (e.g., typhoons Ondoy and Pepeng, and the Maguindanao massacre) and the weekend before the elections instead of airing GMA Weekend Report or Flash Report Special Edition from 2004−07 which also anchored by Enriquez and Tiangco (So have been called Tutok:Eleksyon 2004/2007. The two also appeared in Sunday edition before the 2010 and 2013 elections). Notable guest anchors (once appeared) for the special edition were Saksi anchors Arnold Clavio and Vicky Morales.
On February 21, 2010, the weekend edition of 24 Oras was launched, replacing GMA Weekend Report. Former Balitanghali and current Saksi anchor Pia Arcangel and Reporter's Notebook host Jiggy Manicad were the anchors of weekend edition.
On January 29, 2016, GMA Regional TV announced the return of Balitang Amianan and Balitang Bisdak on February 1, 2016 as a pre-programming and later preemption of the first 30 minutes of Wowowin, after more than a year of using 24 Oras brand. As a result, 24 Oras Southern Mindanao remained to its branding since November 10, 2014 (rebranded to 24 Oras Davao).
On January 2, 2017, the Davao edition adopted the graphics, OBB, and soundtrack of the national edition; while the two other regional newscasts changed only the graphics and OBB similarly to the said national newscast.24 Oras Davao (GMA Davao)
Delivered in Cebuano - Anchored by Tek Ocampo and Sarah Hilomen-Velasco.24 Oras Ilokano (GMA Ilocos)
24 Oras North Central Luzon/24 Oras Amianan (GMA Dagupan) (reverted to Balitang Amianan)
24 Oras Bikol (GMA Bicol)
24 Oras Western Visayas/Ratsada 24 Oras (GMA Iloilo)
24 Oras Central Visayas (GMA Cebu) (reverted to Balitang Bisdak)
24 Oras Northern Mindanao (GMA Northern Mindanao)
24 Oras Southern Mindanao (GMA Davao) (rebranded to 24 Oras Davao)
Mel Tiangco (2004–present)
Mike Enriquez (2004–present)
Vicky Morales (2014–present)
Pia Arcangel (2010–present)
Jiggy Manicad (2010–present)
Nathaniel "Mang Tani" Cruz (2012–present; IM Ready: GMA Weather anchor)
Cata Tibayan (2013–present; Chika Minute Saturday anchor)
Nelson Canlas (2013–present; Chika Minute Sunday anchor)
Iya Villania (2015–present; Chika Minute Weekday anchor)
Pia Guanio (2004–2015; Chika Minute Weekday anchor)
Grace Lee (2010–2012; Chika Minute Saturday anchor)
Luane Dy (2010–2013; Chika Minute Sunday anchor)
New York Festivals
2009 Winner, Gold World Medal for Coverage of an Ongoing Story
2009 Winner, Silver World Medal for Best Newscast
US International Film and Video Festival
2013 Certificate for Creative Excellence, Newscast category (Sendong tragedy)
Asian Television Awards
2005 Highly Commended, Best News Program (Camp Bagong Diwa Siege)
2011 Bronze Telly Award, News/News Feature Category (Super Typhoon Juan)
Catholic Mass Media Awards (CMMA)
2011 Winner, Best News Program
2010 Special Citation for Best News Program (Ondoy and Maguindanao Massacre Coverage)
2007 Winner, Best News Program
2004 Winner, Best News Program
ENPRESS Golden Screen Awards for Television
2011 Winner, Outstanding News Program
PMPC Star Awards for Television
2016 Winner, Best News Program
2011 Winner, Best News Program
2007 Winner, Best Female Newscaster (Mel Tiangco)
2006 Winner, Best News Program
USTv Student Choice Awards
2012 Winner, Best Local News and Current Affairs Program:
2011 Winner, Best Local News and Public Affairs Program
2009 Winner, Best News Program
Gandingan: UPLB Isko't Iska's Broadcast Choice Awards
2013 Winner, Jiggy Manicad: Best Field Reporter
2012 Winner, Best News Program
2011 Winner, Best News Program (tied up with TV Patrol)
2009 Winner, Best News Program
Guillermo Mendoza Memorial Foundation Awards
2011 Winner, Most Popular News Program
2012 Winner, Most Popular TV Program News & Public Affairs
2013 Winner, Most Popular TV Program News & Public Affairs
Northwest Samar State University Annual Awards
2013 Winner, Best News and Public Affairs Program
2013 Winner, Mike Enriquez: Best News and Public Affairs Male Program Anchor
2013 Winner, Mel Tiangco: Best News and Public Affairs Female Program Anchor
2012 Winner, Best News and Public Affairs Program
2012 Winner, Mike Enriquez: Best News and Public Affairs Male Program Anchor
PMAP Makatao Awards for Media Excellence
2012 Winner, Best News Program
2012 Winner, Mel Tiangco: Best TV Female Newscaster
National Academy of Television Arts & Science (Emmy Awards)
2013 Winner, Best Documentary
George Foster Peabody Awards
2014 Winner, Best News Coverage for "Super Typhoon Yolanda"; along with State of the Nation, Saksi, 24 Oras Weekend, & Kapuso Mo, Jessica Soho
The Central Visayas, Western Visayas (retitled Ratsada 24 Oras), Southern Mindanao and North Central Luzon (retitled 24 Oras Amianan) editions were similar to the former regional newscasts like Balitang Bisdak, Ratsada, Testigo and Balitang Amianan. Ratsada 24 Oras made its final broadcast on November 13, the last quarter of 2015 while Balitang Amianan and Bisdak finally returned on February 1, the first quarter of 2016. In October of that year, the Southern Mindanao edition was rebranded into 24 Oras Davao.