Get times on a certain date form list in R

I have a list of times parced with anytime like so:

time <- anytime(ACC$Time)

The content of that parced list is like this:

[1] "2018-12-03 12:36:10 CET"
[2] "2018-12-03 12:36:10 CET"
[3] "2018-12-03 12:36:10 CET"
[4] "2018-12-03 12:36:10 CET"

There are a few hundered thousand entries in and i would like to retrieve all entries of a certain day in my case "2018-12-03". So that i can extract the time and plot that time on graph as an X-axis