The weekly cycle of Product Hunt launches

Each bar is worked out in two steps.

1. Within each day. The final upvotes of the day's featured launches give five numbers, one per chart: the day's #1 launch, its #5 launch, the median and the average of all its featured launches, and its fewest-voted featured launch.
2. Across days. The Across days switch turns a weekday's daily numbers into one bar. Median takes the middle day: half of the period's Tuesdays were higher and half lower. Average takes the mean of all of them.

For example, if three Tuesdays had average featured upvotes of 150, 180 and 400, the Tuesday bar in "Average upvotes of the day's featured launches" is 180 with Median and 243 with Average. With Median, one unusual day can't pull the bar up.

Launch volume grew several times over these years and upvotes changed too. Comparing each day with the other days of its own week takes that change out: every week counts the same, and launches and upvotes read on one scale, in percent.

1. The week's average day. Add up the 7 days of a Monday-to-Sunday week and divide by 7.
2. Each day against it. A Tuesday with 480 launches in a week whose average day had 400 is +20%. A Sunday with 300 is −25%.
3. Across weeks. Do this for every complete week in the period, then take the median (or the average, with the switch) of each weekday's percentages.

Weeks with a missing day are left out: the current week, weeks cut off by the start or end of the period and, for upvotes, weeks that include the last 8 days, whose upvotes aren't final yet.