The date you can get the birthday/trip invitation from these three girls.(After Event)

[ruriwch2]

Kana:
Birthday: 6/24(Sat)
Trip: 7/29(Sat)

Rin:
Birthday: 7/1(Sat)
Trip: 8/6(Sun)

Miuka:
Birthday: 7/8(Sat)
Trip: 8/20(Sun)

[NONE]

Thx bro, needed these information for my Harem achievement

[ruriwch2]

Supplementary information on the date of trip invitation(only trip), these dates (7/29, 8/6, 8/20) are all suitable for all three girls. But the likability level must above 2.

[VertVentus]

These were the afters dates I got on my 3 playthroughs by savescum gambling a few Yomands early and visiting every girl every available day.

• Kana Afters (11) = 6/4, 6/24 (Birthday Ticket), 7/9, 7/23 (Swimsuit), 7/29 (Luxury, Vacation Offer), 8/6, 8/13 (Birthday, Free), 8/20 (Luxury), 9/10, 9/17 (Confession), 9/24 (Confession)
  
• Rin Afters (10) = 6/4, 6/18, 7/1 (Birthday Ticket), 7/30 (Swimsuit), 8/6 (Luxury, Vacation Offer), 8/12, 8/20 (Luxury), 9/3 (Birthday, Free), 9/17 Afters (Confession), 9/24 Afters (Confession)
  
• Miuka Afters (11) = 6/11, 6/25, 7/8 (Birthday Ticket), 7/16 (Swimsuit), 7/29 (Luxury, Vacation Offer), 8/6, 8/20 (Luxury), 8/27 (Birthday, Free), 9/10, 9/17 (Confession), 9/24 (Confession)

So I can confirm Miuka's 7/29 vacation trip and deconfirm Rin's 7/29 vacation trip offer. Perhaps the criteria for vacation trip offers is whether or not it lands on a luxury afters for 50,000 yen?

[Rex da God]

This rng is absolute buillshit when trying to do a harem run where you just don't get lucky on this crap and never get the invite.