Create dates.md

pages/about/dates.md

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+---
+layout: page
+title: Important Dates
+description:
+menubar: about
+permalink: about/dates/
+set_last_modified: true
+---
+
+## Submissions
+
+- **Submissions open**: Monday, February 12 for all but notebooks. Notebooks to open Monday, February 26.
+- **BoFs, Workshops, and Tutorials**: Due Friday, March 22. Notifications Friday, April 26.
+- **Papers and Notebooks**: Due Monday, May 20. Notifications Friday, June 28.
+- **Posters and Talks**: Due Monday, June 3. Notifications Wednesday, July 3.
+- **Camera-ready submissions (Notebooks, Papers)**: Friday, August 9
+
+## Conference
+
+- **Main Conference**: October 15-17, 2023, Albuquerque, NM