If you share the link on your team forums (and I hope you will), this variant might be better to share as it copes with a wider range of characters in usernames

http://wcg.tsbt.co.uk/wcgCert.php?username=davidBAM

This certificate looks great!
One small thought: might it be better to have black text on a white background, rather than white on black? That would save ink when printing.
Cheers
Mark

So far, 49 different users on 15 different teams have generated certificates. Great going.

I just noticed that my runtime stats are little off....

Via your certificate.... Run Time: 229.947 years

Via my overview page... 230:038:00:10:17

Let's say we claim that a year lasts 365 days plus a quarter of a day. This may be a sensible choice in the long run, but when you start counting after a leap year (e.g. 2020), then when one year (e.g. 2021) has passed, the number of days is 365 while we have done figures with 365.25 days; after two years 730 days have passed and we have calculated 730.50 days; and after three years the number of days is 1095 while we computed 1095.75 days.

In any case it's good that you have found the reason for the difference.

We can ascertain if 365 days is correct. One way is to look at one's own stats at verifyMember.do with youraccountname filled out, including its code, i.e. your Verification Code (which you'll find at your Profile), then pick some project with 1 year or more on the scoreboard and do the math.

Example:
<ProjectName>GO Fight Against Malaria</ProjectName>
<ProjectShortName>gfam</ProjectShortName>
<RunTime>34706072</RunTime>

"My project contribution" on my Overview page tells me that this is 1:036:16:34:32 (what units? unclear!).

Anyway, we found 34706072 seconds in this example, so we can start computing (with 365 days (of 86400 seconds each):

perl -we '
	$s = 34706072; # runtime
	$y = int($s / (365*86400)); # years
	$s -= $y * 365*86400; $d = int($s / 86400); # days (remainder)
	$s -= $d * 86400; $h = int($s / 3600); # hours (remainder)
	$s -= $h * 3600; $m = int($s / 60); # minutes (remainder)
	$s -= $m * 60; # seconds (remainder)
	printf "%11d:%03d:%02d:%02d:%02d\n", $y, $d, $h, $m, $s;
'

Run it ...

          1:036:16:34:32

Quelle surprise! Nice outcome.

Now do the math for a project with 10 years or more on the scoreboard that includes at least one leap year.