Google Translate ->
I have not tested but should work
- script DoubleEXP -1,{OnSat2359: announce "Double exp had been active until 23:59 on Sunday",bc_all; setBattleFlag "base_exp_rate",base_exp_rate*2;end;OnSun2359: announce "The Double EXP just",bc_all; setBattleFlag "base_exp_rate";end;}