a-lang=ruby><span style=color:#7f8989;># total seconds since the epoch (1970-01-01 00:00:00 UTC)
</span><span>$ date </span><span style=color:#72ab00;>+</span><span style=color:#d07711;>%s
</span><span style=color:#d07711;>1722422393
</span><span>
</span><span>$ date </span><span style=color:#72ab00;>-</span><span>d @</span><span style=color:#b3933a;>1722422393 </span><span style=color:#72ab00;>+</span><span style=color:#d07711;>'</span><span style=color:#aeb52b;>%F %T</span><span style=color:#d07711;>'
</s