set datafile separator " "

set terminal pngcairo size 1200,800
set output "tweet-times.png"

set title "Tweets by TomNomNom"
set xlabel "Year"
set ylabel "Time of day (GMT)"

set xdata time
set timefmt "%Y-%m-%d"
set format x "%Y"
set xrange ["2008-01-01":"2025-01-01"]

set ydata time
set timefmt "%H:%M"
set format y "%H:%M"
set yrange ["00:00":"23:59"]

set grid

set style data points
set pointsize 0.5
set key off

plot 'tweet-times.txt' using (timecolumn(1,"%Y-%m-%d")):2