T.G.I. Phi-day Square

MooglyCAL 2026

Read the Story:

Or feel free to skip straight to the pattern. It won’t hurt my feelings!

Welcome to another installment of my contribution to the MooglyCAL with the T.G.I. Phi-day square! Why Phi-day, do you ask? Well, it’s the most wonderful, glorious, golden day of the year. While not as popular as pi - celebrated every March 14th (3/14), the number phi (ɸ) still garners a hug fan base dating all the way back to ancient civilizations. You may even recognize it yourself once you see what it actually represents…

You see, phi is another name for the golden ratio - approximately 1.618. A cool feature about this number is that its inverse is the same as itself minus one, so phi-1=1/phi. In other words, the inverse of 1.618 is just 0.618 (making Phi Day 6/18 or June 18th). Why does this matter? Because of this special property of the number phi, the golden ratio becomes a convenient and beautiful way to arrange things that form simultaneously asymmetrical and symmetrical patterns - which is why it appears everywhere from art to nature!

Famous examples of where this ratio is found is in the spirals of shells, petals and seeds of flowers, Renaissance paintings, Greek architecture, the Fibonacci series (1, 1, 2, 3, 5, 8, etc.), and even the proportions of the human body. And now you get to continue this legacy of beauty and proportion with your very own square inspired by the golden spiral - an arrangement of squares where each one grows 1.618 times the previous square or by a factor of 0.618 and align perfectly around each other with no gaps.

Using modular crochet techniques, this square is completely seamless in its construction, and while you only need 12” (30.5cm) for the MooglyCAL, there is no limit to how large you could continue to grow this design as you spiral around and around with each new square - a truly boundless work of art!

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	Materials & Pattern Information
Yarn	Swish Worsted 100% Fine Superwash Merino Category 4 | Worsted Weight | 9 WPI 110yd/1.75oz (100m/50g) per skein (1 skein each color) “Dublin” (Color A), “Shortbread” (Color B), and “Allspice” (Color C)
Hook	US J/10 (6mm) Recommended hooks: Clover Amour, Furls, WeCrochet Dots, Tulip Etimo
Notions	Yarn Needle, Scissors,  Stitch Markers*, Blocking Mats, Blocking Pins *optional to mark first and last stitches of each rows as well as to mark right side of work
Challenge Level	For adventurous beginners. Techniques include single crochet and modular colorwork (explained in written instructions).
Finished Size	12 x 12 in (30.5 x 30.5 cm) - blocked
Gauge	4” (10cm) worked in single crochet rows: 13 sts, 4.5 rows

Check out the tutorial video for pattern support:

Stitch Information
Abbreviations Used Ch(s) Chain(s) Ea Each Hk Hook Inc Increase Lp(s) Loop(s) Rem Remaining RS Right side Sc Single crochet Sk(d) Skip(ped) Sl st Slip stitch St(s) Stitch(es) WS Wrong side Yo Yarn over	*Uncommon technique instructions: Join with sc When beginning a new square section with the next color - create a slip knot and place on hk, insert into corner, yo, pull up a lp (2 lps on hk), yo, pull through both lps. Modular Crochet Join and work into the sides of previously created sections of your work. See the image below for guidance on working into the sides of single crochet rows:

Notes (definitely don’t skip)

• Stitch counts are only given after the first row and are presented inside <> brackets. If no stitch count is given, the stitch count is the same as the previous row.

• When starting your next modular section:

  • Always start on the RS when joining with a single crochet into the corner of the previously made section.

  • Right-handed - join in the top-left corner then turn to work first row along left edge.

  • Left-handed - join in the top-right corner then turn to work first row along right edge.

• Keep tails to the WS to weave in later or weave in as you go.

• Use an optional stitch marker to mark the RS of the work.

• Written instructions for the full square are given first followed by a visual chart at the end of the pattern showing the arrangement and direction of work for each section.

Pattern Instructions

Modular Section 1 - Color A
Notes	Ch-1 turning ch does not count as a st.
Setup	Ch 3, turn.
Row 1 (RS)	Sc in second ch from hk and in next ch, turn. <2 sts>
Row 2 (WS)	Ch 1, 2 sc, turn.
Row 3	Rep Row 2, fasten off.
Continue to “Modular Section 2”

Modular Section 2 - Color B
Notes	Remember to use techniques explained in the Stitch Information and Notes when joining and working along the edge of the previous section.
Row 1 (RS)	3 sc along edge of previous section, turn.
Row 2 (WS)	Ch 1, sc across, turn.
Row 3	Rep Row 2, fasten off.
Continue to “Modular Section 3”

Modular Section 3 - Color C
Notes	From this section moving forward, you will work along the sides of rows for the first part of the edge of the previous section and then work into the last-row sts of the section before that one.
Row 1 (RS)	5 sc, turn.
Row 2 (WS)	Ch 1, sc across, turn.
Rows 3-5	Rep Row 2, fasten off.
Continue to “Modular Section 4”

Modular Section 4 - Color A
Notes	From this section moving forward, you will work in an established pattern. Cycle through Color A, B, C, A, B, C, A, B, C, etc. Number of starting sc in ea new Modular Section is the row count of the previous section + the stitch count of the section before that Example: Previous section had 5 rows + section before that’s 3 sts = 8 sc in this section
Row 1 (RS)	8 sc, turn.
Row 2 (WS)	Ch 1, sc across, turn.
Rows 3-8	Rep Row 2, fasten off.
Continue to “Remaining Modular Sections”

Remaining Modular Sections
Notes	Continue working in the established pattern explained in Modular Section 4
Instructions	If you matched the gauge listed in this pattern, Modular Section 7 will be your last fully worked square section. However, even if you didn’t match gauge, you can continue working new Modular Sections until the longest side of your working rectangle reaches 12” (30.5cm).
Continue to “Final Modular Section”

Final Modular Section
Instructions	Work one more partial section (won’t be a full square like previous ones) until you have a 12x12” (30.5x30.5cm) square. Note: The rows in this section + the sts from the previous section should equal the same as the stitches of the section before that. Example: If I ended with Modular Section 7, I’ll  work the same number of rows as Modular Section 6 (21 rows) to create a square.
Continue to “Finishing”

Finishing
Border	With RS facing you and using whichever color you want to be the final border (A, B, or C), join with sc in a corner, ch 1, sc across to corner, 3 sc in corner, rep from around ending with 2 sc in corner where you joined, sc evenly along sides of rows to corner, 3 sc in corner ch, work 1 sc in ea ch along bottom of square to corner, 3 sc in corner ch, sc evenly along sides of rows, 2 sc in first st (should already have 1 sc worked in it), join with sl st into first st, fasten off.
Blocking	Weave in loose ends. Wash and block to 12” by 12” (30.5 by 30.5 cm). Enjoy!

Visual Charts
Instructions	The charts on the following pages indicate the arrangement of colors, the size of each modular section, and the direction in which the first row is worked. A solid dot shows where to join the new color when starting a new modular section.

Right-Handed

Left-Handed

Copyright, Selling Finished Projects, and Pattern Support

This pattern is designed and copyrighted by Cocky Crocheter LLC as a free pattern for part of the Moogly CAL 2026. No part of this pattern – including images, charts, and instructions – may be shared or reproduced.

Items created using this pattern are allowed to be sold with credit given to Kelly Baum-Sehon (The Cocky Crocheter) as the original designer of the pattern. Feel free to share on Instagram and tag me @cocky_crocheter; I love seeing your beautiful work! Additionally, feel free to tag Tamara @mooglyblog and use hashtag #mooglyCAL2026.

The designer has made every effort to make instructions clear, but confusion can still arise. The designer is always willing to offer pattern support if you have questions about any of the instructions.

Contact the designer with any questions regarding copyright, selling finished projects, and pattern support at kbaumsehon@gmail.com.