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I would write the formatting code as follows:
('"%2d-%s-%04d %02d:%02d:%02d %+03d%02d"' %
 ((tt[2], _month_names[tt[1]], tt[0]) +
 tt[3:6] + divmod(zone//60, 60)))
The above also assumes that month names are stored in a 1-based array:
_month_names = [None, 'Jan', ...]
Note that %2d format code takes care of space-padding.
If you think the expression that I conjured is too cryptic, get the temporal data from timetuple first with say
y, m, d, H, M, S = tt[:6]
and use named variables in the formatting expression.