[Gnuplot-info] time axis plotting

I've tried modifying timedat.dem to plot the following without success:

1 2026/02/05 20:41 26.81 38.09 983.28 13.53 0.17 2.77
2 2026/02/05 20:57 26.8 38.02 983.32 13.54 0.21 2.76
3 2026/02/05 20:58 26.81 38.01 983.29 13.55 0.07 2.75
4 2026/02/05 20:59 26.81 38.0 983.28 13.55 0.19 2.75
5 2026/02/05 21:00 26.81 37.98 983.33 13.55 0.21 2.8
6 2026/02/05 21:01 26.81 37.99 983.34 13.55 0.21 2.81
I volunteered to help someone else and painted myself in a corner.  Would like to show time and date on the X axis.  The first demo would be fine, but I've not been able to reformat the data into something gnuplot will accept. Not clear whytimedat.dat  works and my version won't


Thanks,Reg