warning messages with timeDate

When I am run the two following queries I get warning messages with the second one despite the time being the same does this matter I set myFinCenter to "GMT"?

Sys.time()

[1] "2004-06-24 17:35:27 GMT Daylight Time"

Sys.timeDate(FinCenter = myFinCenter)

[1] "GMT"
[1] [2004-06-24 17:35:46]
Warning messages: 
1: Set timezone to GMT! in: Sys.timeDate(FinCenter = myFinCenter) 
2: Set timezone to GMT! in: timeDate(as.character(Sys.time()), zone = "GMT", FinCenter = FinCenter) 
3: Set timezone to GMT! in: print.timeDate(structure(list(), Data = structure(list(sec = as.integer(46), 

Regards,

Tom Joy