I am newbie in flot charts, i don't know what is the number 1262304000000, 1264982400000, 1267401600000,... meaning.
var d1 = [[1262304000000, 6], [1264982400000, 2057], [1267401600000, 2043], [1270080000000, 2198], [1272672000000, 2660], [1275350400000, 1826], [1277942400000, 1302], [1280620800000, 2237], [1283299200000, 2004], [1285891200000, 2144], [1288569600000, 1577], [1291161600000, 1295]];
Thank you very much