Source and decoding - Ketubot 2a
בְּתוּלָה נִשֵּׂאת לַיּוֹם הָרְבִיעִי וְאַלְמָנָה לַיּוֹם הַחֲמִישִׁי. שֶׁפַּעֲמַיִם בְּשַׁבָּת בָּתֵּי דִינִין יוֹשְׁבִין בָּעֲיָירוֹת: בַּיּוֹם הַשֵּׁנִי וּבַיּוֹם הַחֲמִישִׁי, שֶׁאִם הָיָה לוֹ טַעֲנַת בְּתוּלִים, הָיָה מַשְׁכִּים לְבֵית דִּין.
A virgin marries on Wednesday, and a widow on Thursday. For courts sit in the towns twice a week, on Monday and Thursday, so that if he had a claim concerning virginity, he would go early to court.
Start with the weekly calendar. A Wednesday wedding allows a husband with a claim concerning virginity to approach the court on Thursday morning. This is a claim to investigate, not a finding that it is true. Yet a Sunday wedding would also allow court access the next day. The Gemara completes the structure: the Sages provided for the welfare of Jewish women by arranging three days of work on the feast, Sunday through Tuesday. This also has a consequence for maintenance when the appointed marriage time falls on Sunday. This lesson focuses on that structure, not the later questions about unavoidable delays.