<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">You should really take a look at the starting guide of NCL and to the documentation of the individual functions before posting questions here.<div class=""><br class=""></div><div class="">I’ve just checked your file and it seems that the time variable has the right attributes. <br class=""><div class=""><br class=""></div><div class="">Something like this should work (NOT TESTED)<br class=""><div class=""><br class=""></div><div class=""><font face="Menlo" size="1" class="">a=addfile("tmp2m.1995053100.time.grb2","r”)</font></div><div class=""><font face="Menlo" size="1" class="">time=a->forecast_time0</font></div><div class=""><span style="font-family: Menlo; font-size: x-small;" class=""><br class=""></span></div><div class=""><span style="font-family: Menlo; font-size: x-small;" class="">date_title= </span><span style="font-family: Menlo; font-size: x-small;" class="">"Forecast for "</span><span style="font-family: Menlo; font-size: x-small;" class="">+</span><span style="font-family: Menlo; font-size: x-small;" class="">cd_string</span><span style="font-family: Menlo; font-size: x-small;" class="">(time, </span><span style="font-family: Menlo; font-size: x-small;" class="">"%d %c</span><span style="font-family: Menlo; font-size: x-small;" class="">.</span><span style="font-family: Menlo; font-size: x-small;" class=""> %Y"</span><span style="font-family: Menlo; font-size: x-small;" class="">)+</span><span style="font-family: Menlo; font-size: x-small;" class="">" at "</span><span style="font-family: Menlo; font-size: x-small;" class="">+</span><span style="font-family: Menlo; font-size: x-small;" class="">cd_string</span><span style="font-family: Menlo; font-size: x-small;" class="">(time, </span><span style="font-family: Menlo; font-size: x-small;" class="">"%H:%M"</span><span style="font-family: Menlo; font-size: x-small;" class="">)+" UTC</span><font face="Menlo" size="1" class="">”</font></div><div class=""><span style="font-family: Menlo; font-size: x-small;" class=""><br class=""></span></div><div class=""><span style="font-family: Menlo; font-size: x-small;" class="">Cheers </span></div><div class=""><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">Il giorno 08 ott 2017, alle ore 11:40, dale zuri <<a href="mailto:dalezuri@gmail.com" class="">dalezuri@gmail.com</a>> ha scritto:</div><br class="Apple-interchange-newline"><div class=""><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; float: none; display: inline !important;" class="">date = cd_calendar(r, -3)</span></div></blockquote></div><br class=""></div></div></div></div></body></html>