EOL:Website-time.formats.forum/qqq


 * %a - The abbreviated name ("Sun" of Sunday)
 * %b - The abbreviated month name ("Jan")
 * %d - Day of the month, zero-padded (01 to 31)
 * %Y - Year with century (can be negative, 4 digits at least)
 * %H - Hour of the day, 24-hour clock, zero-padded (00 to 23)
 * %M - Minute of the hour (00 to 59)

See also http://ruby-doc.org/core-2.0/Time.html#method-i-strftime