I found out from my sister's Facebook post about National Sibling Day which is a holiday that is recognized in some parts of the US when she posted a #throwback picture of the three of us.
I sent her a Whatsapp message and here's what she said:
Well, that's my youngest sister. And she asked me for a diamond ring. *swt*
Anyway, sisters, Happy Belated Sibling Day to you too! Here's a #throwback picture for all of you. A toilet selfie during our recent trip at Siem Reap