Senate passes bill to keep New Mexico on Daylight Saving Time. FILE - Custodian Ray Keen checks the time on a clock face after changing the time on the 97-year-old clock atop the Clay County Courthouse, in this Nov. 6, 2010 file photo taken in Clay Center, Kan.
The time is takes for a package to clear customs varies from one  day to one month. The way a package is shipped has a lot to do with  how long it will take to clear.
I've received packages from America. It usually takes between one and two weeks. It's very important that you mark the package properly, in particular declaring the value. And if you're exporting something, you should consider the import duty. IIRC, import duty starts to be payable if the value of the item is greater than UK 15 (US$30).