at least a 2-year period, without any nonseasonal episodes occurring during this
period. In addition, the seasonal depressi ve episodes must substantially outnum-
ber any nonseasonal depressive episodes over the individual’s lifetime.
This specifier does not apply to those situations in which the pattern is better ex-
plained by seasonally linked psychosocial stressors (e.g., seasonal unemployment
or school schedule). Major depressive episodes that occur in a seasonal pattern