Recently I was reviewing my Google analytics data and I noticed the traffic drop for February 9, 2015.
I check my web servers access logs and there was no traffic drop according to access logs.
While searching further in Google, I noticed that many Google Analytics users faced the same issue on February 9, 2015. Many users had reported the same issue in their official support forum.
Example thread:
https://productforums.google.com/forum/?hl=en#!category-topic/analytics/R6nInhGNRJI
So far, I am still seeing that traffic data is not updated for February 9, 2015.
Looks like they have fixed the issue. Now i can see the statistics for Feb 09, 2015.