PanSIG is an annual conference sponsored and organized by many of the Special Interest Groups (SIGs) of the Japan Association for Language Teaching (JALT). You do not have to be a JALT member to attend, but JALT members pay less in registration fees than non-members.
The conference timeline varies from year to year, but, generally speaking, the conference is held in May.
For those interested in giving a presentation, workshop, or poster presentation, the call for proposals is usually announced in November or December, and the deadline is usually in mid-January. All proposals are vetted by blind review, and the results are made available by mid-March. Presenters are expected to register for the conference soon thereafter, though registration payment is usually due at the beginning of April.
For those wishing to attend, the earlybird payment is usually due by the beginning of April, so to enjoy the earlybird discount, be sure to send your payment in early. If you found out about the conference late, you can of course pay the fees at the door when you arrive.