Take care with dates in English e-mails

The English speaking world does not agree on how to write dates. For the 21st of June, Americans use "06/21/2018", while the British use "21/06/2018".

To avoid confusion, prefer to write either "June 21, 2018" (which is American English), or "21 June 2018" (which is British), but which cannot be misinterpreted.