Server.log not showing date and time for each entry?

I've been digging through my server.log and I noticed that it isn't logging date and time for each entry of the file:

<code>
Plugins::Spotify::Spotifyd::_checkAlive (146) spotifyd has failed restarting
Slim::Utils::Timers::__ANON__ (273) Error: Timer Slim::Plugin::UPnP::Events::expire failed: Can't call method "pluginData" on an undefined value at C:/PROGRA~2/SQUEEZ~1/server/Slim/Plugin/UPnP/MediaRenderer/RenderingControl.pm line 161.
Slim::Utils::Timers::__ANON__ (273) Error: Timer Slim::Plugin::UPnP::Events::expire failed: Can't call method "pluginData" on an undefined value at C:/PROGRA~2/SQUEEZ~1/server/Slim/Plugin/UPnP/MediaRenderer/AVTransport.pm line 216.
Plugins::Spotify::Spotifyd::_checkAlive (146) spotifyd has failed restarting
Plugins::Spotify::Spotifyd::_checkAlive (146) spotifyd has failed restarting
Plugins::Spotify::Spotifyd::_checkAlive (146) spotifyd has failed restarting
Plugins::Spotify::Spotifyd::_checkAlive (146) spotifyd has failed restarting
Plugins::Spotify::Spotifyd::_checkAlive (146) spotifyd has failed restarting
Plugins::Spotify::Spotifyd::_checkAlive (146) spotifyd has failed restarting
Plugins::Spotify::Spotifyd::_checkAlive (146) spotifyd has failed restarting
Slim::Schema::forceCommit (2149) Warning: Trying to commit transactions before DB is initialized!
</code>

I see others' log files look like this before each line:
[17-01-31 17:51:47.0015]

I don't see an obvious setting for log format - did I miss something?