gendata.js

const daysPerMonth = [
	31,
	28,
	31,
	30,
	31,
	30,
	31,
	31,
	30,
	31,
	30,
	31,
];

function twoDigits(d) {
	if (d < 10) return '0' + d;
	return d.toString();
}

const daysPerLine = 10;

const lines = [];


for (let month = 1; month <= 12; month++) {
	const days = daysPerMonth[month - 1];
	let line = [];
	for (let day = 1; day <= days; day++) {
		if (line.length >= daysPerLine && day !== 31) {
			lines.push(line);
			line = [];
		}

		line.push(twoDigits(day) + ' ' + twoDigits(month));
	}

	if (line.length) lines.push(line);
}

let lineNum = 80;

for (const line of lines) {
	console.info(lineNum + ' DATA ' + line.join(','));
	lineNum += 10;
}