Hi Martin, On 6/04/2019 6:44 pm, Martin Burnicki wrote: > Steve Olney wrote: >> Wouldn't the time actually be 18 seconds earlier ? - i.e., 23:59:42 - >> due to leap seconds ? >> Martin Burnicki wrote: >> so the WNRO >> occurs 18 s before UTC midnight. So - yes. Thanks for the clarification. Cheers Steve