Bangkok--Dec 18--BisnewsSaturday, December 19, 199813.30 hrs Unilever Thai Holdings , Discovery Club and Angel magazine joinly hold "The Angels of Discovery Club" at Grand Hall , Siam Center19.00 hrs Pranda Jewelry celebrates its 25th anniversary at Monthien Riverside HotelSunday, December 20, 1998 08.00 hrs Federation of Thai Industry organises a seminar on debt restructuring at Rama Garden HotelMonday, December 21, 199810.00 hrs Business Day Ltd led by Chartchai Yenbamrung arranges a press conference highlighting its electronic commerce service demonstration on 22nd floor, Olympia Thai Bldg15.00 hrs Bangkok International Airport Ltd sings an MOU with the Supreme Command Headquarters on solving flood problems in the surrounding area of the 2nd Bangkok International Airport17.30 hrs Business Management Association of Thailand holds a special lecture on lessons for Thai businesses in 1998 at the association, Ramkamhaeng 39End.