You can try dashclock from play store. It's a widget that you can put on the lockscreen and it has a lot of extensions allowing you to see between others: clock, date, calendars, weather, alarm, gmail, whatsapp, sms, missed calls etc, battery info, etc...
Sent from my Nexus 4 using XDA Premium 4 mobile app
LG G2 - CPU binned 3
Current ROM: Rooted Stock 4.2.2
Current Kernel: Stock
Previously owned devices: Nokia N96>HTC HD2>HTC DESIRE HD>SG NEXUS>HTC SENSATION XE>SGSII>SGSIII>LG NEXUS 4>LG G2
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Damn! I think I got it...
I got ORD => Obsessive ROM-updating Disorder => Click here!