actually canonically (oh dear nerd) it probably isn't even 2003.... or at least it's maybe 2002 or 2003
I know 2003's the year we started but canonically there might actually be evidence for this (obviously this isn't fact and is me being pedantic)
right so STC was running a comic year was a mobius year (i.e the actual date was mentioned many time in 1997 IRL it was 97 Mobius year etc) so the comic ended in 2000
so 224 take place just after and is therefore also 2000
right so now add 2 previous christmas stories (Christmas specials 2006[or Mobius 2000] and 2007[Mobius 2001])
and this one and your at around 2002
so STC 172 to 240 is the year 2000 (which is 28 actual issue's plus 1 special with a story)
STC 241-244 was a short and boring year of off screen adventure.. 2001 (These will later be picked up by a series of STC Audio play's).
STC 245-259 (14 issues) is 2002
Also the Data Zone in 250 states that 236 was over 2 years ago, and you can just about stretch this to work if you suggest
236 is september ish 2000
and 250 is around september 2002
though this implies 224-236 take place in june to september
and 240-250 takes place over 2 years
and 251-259 plus the last couple of specials take place in about 3 months
so it is 2002
or you could suggest an unseen christmas to make the data zone in 250 work better and this would be christmas 2003
TL;DR
I said a bunch of stuff even I didn't really care about