Though many stations are planning to air specials for the celebration of the first federal holiday honoring Martin Luther King Jr., most stations have not granted an official day off to their employes.

Many stations -- such as WKYS-FM (93.9), WWRC-AM (980), WGAY-FM (99.5) and WGMS-FM/AM (103.5/570) -- are allowing their employes to take a personal day off, following the policy set for religious holidays such as Rosh Hashana. WAMU-FM (88.5), WETA-FM (90.9) and WPFW-FM (89.3) have given their employes an official holiday. WHUR-FM (96.3) is giving a holiday to its off-air staff. WWDC-FM (101.1) does not give any "birthday" holidays but is honoring requests for personal leave.

A group of disgruntled employes at WKYS circulated a petition protesting that the holiday isn't an official day off, and Donnie Simpson, the program director, spoke against the decision made by NBC, which owns WKYS, during his morning show. Simpson read a memorandum listing all the official holidays for 1986. "And I said, 'Where is Dr. King's Birthday?' We fought a long time for this, and now we find the fight goes on," said Simpson. He isn't planning to work. Ernie Fears Sr., general manager at WRQX-FM (107.3), which is owned by ABC-Capital Cities Inc., said he is planning to take a personal day Monday. "But I wish it could have been an official day," said Fears. King Specials

Mike Anders of WMAL-AM (630) will anchor a five-part series, "Martin Luther King Jr: The Legacy," which will air throughout Sunday . . . WDCU-FM (90.1) is playing an excerpt from a King speech every hour through Monday. Both WHUR and WDCU plan to cover the unveiling of the King mural live from the Martin Luther King Memorial Library downtown at 12:30 p.m. Monday . . . WAMU will air a speech by Bishop Desmond Tutu commemorating the birthday of King at 10 a.m., to be followed by a discussion on black progress since the 1960s with Diane Rehm and Roger Wilkins of the Institute for Policy Studies . . . WETA will play Joseph Schwantner's "New Morning for the World" at noon . . . WWRC, WGAY and WGMS will play an excerpt from King's "I Have a Dream" speech at 12:15 p.m. Monday . . . WPFW will air a concert dedicated to King with Archie Shepp and Malcolm Goldstein at noon Monday. It will also feature a special tribute produced by Drepenba Manzira from 7:30 to 9 p.m. Job Shifts

Robert Aubry Davis, arts and humanities producer at WETA and host of three of the station's shows, has been appointed host of "Around Town." This 30-minute local arts show is scheduled to debut on WETA-Channel 26 Feb. 3 . . . Marilyn Thompson of WASH-FM (97.1) is returning to full-time status at the station and will be hosting the weekday 7 p.m. to midnight shift . . . David Foxx, who has worked at WCLY-FM (95.5) for the last eight years, has been appointed director of productions and operations. Starting Monday Foxx also will be the permanent host of "Love Songs" each evening at 7 p.m. After Jan. 27 the program will be known as "Love Songs After Dark." Al Santos, formerly of WPIX in New York, will take over Foxx's midday shift . . . Max Cacas has left WXTR-FM (104.1) for a reporting slot at WBAL in Baltimore; his replacement as morning news anchor is Matt Coates, alumnus of National Public Radio, WAMU and WLTT-FM (94.7). Public Numbers

According to the latest Arbitron Ratings, WAMU has made impressive gains in its audience size over a year ago. Craig Oliver, program director of WAMU, reported this week that the station had "our best book ever." The ratings showed that the American University station had a weekly audience of 199,200, up from 178,000 last year. That, combined with an increase in overnight listeners, puts the station over the 200,000-listener mark for the first time. Charity Updates

Max Reznick and the listeners to his weekly show on WNTR-AM (1050) helped raise $43,000 last month for the Hebrew Academy. This Sunday Reznick will do a remote from the United Jewish Appeal Federation fundraiser at the Capital Hilton from 9 a.m. until noon . . . John Lyon and Ed Walker of WMAL raised $25,750 for the Leukemia Society at a New Year's Eve party . . . The crew at WWDC raised $4,000 for the Special Olympics at an "office party" last month. They also helped bring in 6,000 cans of food for Temporaries Inc.'s annual drive for needy families. . . . The annual Neediest Kids drive, sponsored by Q-107 and WJLA-Channel 7, raised more than $7,000. Q-107 collected 1,200 toys in the "Toys for Tots" effort.