Parse timestamp with a.m./p.m

Question

I have a file that formats time stamps like 25/03/2011 9:15:00 p.m.

How can I parse this text to a Date-Time class with either strptime or as.POSIXct?

Answer 1

It appears the AM/PM indicator can't include punctuation. Try it after removing the punctuation:

td <- "25/03/2011 9:15:00 p.m."
tdClean <- gsub("(.)\\.?[Mm]\\.?","\\1m",td)
as.POSIXct(tdClean, format="%d/%m/%Y %I:%M:%S %p", tz="UTC")
# [1] "2011-03-25 21:15:00 UTC"