Not sure what im doing wrong i have enabled the nighttime bonus and set it to announce but nothing happens 

NightBonus": {
"broadcastEnabledBonus": true,
"enableNightBonus": true,
"logEnabledBonusConsole": false,
"PointsPerHitAtNight": {
"A": 50,
"M": 50,
"S": 50,
"WC": 50

any ideas what im doing wrong