Padding months, days, and hours

[Fastidious]

How do I go about adding padding to months, days, and hours? I figure it is on view.oak, in here:

fn date(t) {
        d := datetime.describe(t)
        '<a class="datestamp" href="/on/{{0}}/{{1}}/{{2}}" title="Updates on this date">{{0}}/{{1}}/{{2}}</a>
        <a class="clockstamp" href="/updates/{{5}}" title="Permalink to this update">{{3}}:{{4}}</a>' |> format(
                d.year
                d.month
                d.day
                d.hour
                d.minute |> string() |> padStart(2, '0')
                t
        )
}

I tried adding |> string() |> padStart(2, '0’) after d.month, d.day, and so on, just like d.minute has, but that didn’t work.