I have given small titles this time for each date.
Do comment if they ok!

A Turning Point
27 January 1977

Sirius loped into the Head's Tower, a strange smile spread across his face. James looked up expectantly from his place on the floor, lazing in front of the roaring fire as he did his Transfiguration homework. "Well?"

Sirius nodded, his face breaking into a grin. "I did it. I spent my dirty Black inheritance and I'm glad to be rid of it."

James nodded, pleased. "So… does this mean no more summers at my house?"

Sirius frowned, reluctant and apologetic. "Mate, I'll always come and visit, you know that. It's just… I can't live off your parents anymore, it doesn't feel right, and I had the means for a place of my own, so…."

James nodded again; when there was nothing more one could do, a nod seemed the logical response. "I understand," he said quietly. "It's just that I'll miss you a bit, that's all."

A Wedding
4 April 1977

"You sure you don't want to sit down?" James murmured in her ear.

Lily turned to him, startled, and shook her head vehemently. "No, no. This is Petunia's special day and if she doesn't want me here I… I won't ruin it for her, ok?"

James sighed and went to stand behind Lily, drawing his arms around her and letting her lean back against him.

"Should have bought the invisibility cloak," she murmured offhandedly, watching the bridesmaids and groomsmen walk down the aisle together.

It was strange, Lily felt, that the great majority of the wedding party seemed to come from Vernon's family. James, on the other hand, was doing all he could to bite his tongue and resist voicing the opinion that with those large pink dresses and the oh-so-many ruffles and ribbons, the bridesmaids (rather plump, as they were) bore a striking and startling resemblance to a string of prize pigs.

One Moment in Chaos
2 May 1977

"Lily!"

Lily paused by the double doors of the Great Hall and waited for Emmeline to catch up. The seventh years were spilling out of the castle and onto the lawns, much as they had done in their fifth year after the OWLs exams. The difference would be that this time, Lily (and in all likeliness Emmeline and Benjamin) would inevitably join the Marauders to bask in the late afternoon sun, and celebrate another NEWT exam well and truly over.

"How'd you find it?" Emmeline asked, linking her arm with Lily's as they followed the crowd.

Lily shrugged, shading her eyes as she scanned the grounds for the boys. Predictably, there they were beneath the old beech tree by the lake. "I don't really care, as long as I pass, to be honest," she murmured in reply.

Emmeline rolled her eyes. "Well I think I mustered up at least an A, and lets face it, Lily, if you get less than an O in Charms I'll be shocked. "

They made their way across the lawn. Lily shrugged again, just before she reached their destination. Once there, she would sink onto the grass besides James, and he would kiss her lips in greeting, and then they would sit and watch their friends together. Sirius and Emmeline would probably sit as far away from each other as possible, something made exceptionally difficult by Sirius' blossoming friendship with Benjy.

Remus would arrange himself wherever was the most convenient to everyone else, and pull out the textbook for his next exam. Wormtail would sit beside Remus and anxiously try to read over his shoulder, something Remus would inevitably bear with great patience….

Lily turned to Emmeline, raising her voice just loud enough for it to catch the ears of anyone, beneath the tree they were approaching, who was listening. Grinning as she made her casual announcement, she watched the effect of her words on her group of friends.

"Exams aren't the most important thing in the world, Em."

A Coming of Age
30 May 1977

"Lupin! Pettigrew! Black!"
Sirius froze, appalled at being caught so quickly and so stealthily. Resigned, he shared a look of surprise with Remus before the three of them turned around to face-
"Prongs!"
James grinned; Sirius sounded quite delighted.
"I saw you lot sneaking away from the ceremony," the Head Boy told them sternly, thrusting his hands deep into his robes. "And I thought to myself, surely they
aren't going off mischief making without me?"
Remus shrugged apologetically. "We didn't think you'd be able to get away, sitting up on the stage, and all."
James grinned. "Oh, well," he murmured lightly. "Lily said she'd cover for me, but let's make this quick, all right?"
"Lily said she'd cover for you?" Even Peter sounded impressed.
"Oh she's a real gem, lads-"
"And you're madly in love. We know. Now can we get a move on?"

The Marauders continued along the corridor, and it wasn't until they'd arrived at the door of Filch's office that James thought to ask, "What exactly are we doing?"
Remus took it upon himself to explain. "Well, you know how we decided that the Map should probably stay here, for some other mischief maker to pick up?"
James nodded, grinning. "To preserve the spirit of mischief for future generations, Moony," he corrected.
Remus shrugged, grinning. "Whatever. Well, we figured last night that Filch's office was probably the safest place."
James frowned. "And you didn't have time to talk this over with me? I mean – Filch's office! We may as well hand it to him ourselves as a going away present, and watch him burn it."
James sounded, in short, appalled. Peter hastened to reassure him, but was cut off by Sirius.

"You're missing the point, Prongs," Sirius told him bracingly. "Filch has a drawer, you see…. A drawer of things so dangerous that even he doesn't touch them."
"And how do you know this?" James demanded skeptically.
"I remembered last night, from when we rescued the map!"
"A drawer marked Confiscated and Highly Dangerous," Peter confirmed.
"It's perfect, because the only people who will ever look in there will be up to just as much trouble as we were whenwe found it!"
"So we're leaving the highly prized and coveted Marauder's Map in a filing cabinet drawer, right under Filch's nose?" James sounded highly dubious, but Sirius, Remus and Peter all nodded with various stages of enthusiasm.

James sighed, resigned. He supposed that if worst came to worst, they could rescue it themselves. "Fine… lets do this, then, shall we?"

…

"So where did you go?" Lily murmured curiously, as James slipped back into his seat beside her on the stage.
James smiled. "Filch's office, I'll explain later. Where are we up to?"
Lily looked all at once surprised and intrigued. "Dumbledore's address should be finishing any minute. How-?"
James shook his head and turned his attention to the Headmaster.

…

Half an hour later, James and Lily stood together on the platform, watching as the last of their class spilled out of the Great Hall. It seemed as if some couldn't escape fast enough. Others took their time.

James gripped Lily's hand and smiled at her. "Ready to graduate, Miss Evans?"

Lily shrugged, staring around the Great Hall, misty eyed. "I don't know if I can do this, James…"
"Of course you can," he told her comfortingly, jumping down from the platform and waiting to catch her. "And I'll be right beside you, every step of the-"

"Oi, you lot!" the other three Marauders waited in the doorway, silhouetted by the late afternoon light. "Get a move on, will you?!"

Lily and James exchanged a smile. "We're coming!"

An Offer
19 June 1977

"Sirius!"

It wasn't at all what Sirius expected to hear, this voice echoing down the crooked lane way. He had been standing there for half an hour, hands stuffed deep into his pockets, dreaming of Florean Fortescue's Ice-cream Parlour, only a few hundred yards away, and yet, for some strange reason he had been compelled to wait, and what for what?

Apparently –

It was a child's voice that sounded behind him now. No, not such a child. More that of a boy, one growing into adulthood even as he spoke. It was, Sirius knew instantly, the voice of his brother.
"Regulus?"
He would have been what, fifteen now? Sixteen?
"What do you want, Regulus?"
Regulus moved closer. His eyes were the same shade as his brother's, but they seemed even now, darker and more menacing.
"I have been sent," he informed Sirius, head held high, chin jutting out with pride.
"Sent?" Sirius spat the word out in disbelief. "Merlin, Reg, tell me you haven't…?"
Regulus smiled coldly. "Not officially, no. I'm too young. But I will, brother."
"And what has that got to do with me?"
Regulus sounded surprised. "Everything! Surely you knew this was coming, Sirius? They – we – want you to join us."

"Never."

Regulus raised his eyebrow, looking every inch the cocky teenaged heartbreaker. "Is that wise, Sirius?" he asked softly.
Sirius shrugged, scuffing the toe of his left shoe on the cobblestones. "Probably not," he remarked softly. "But I never did what was smart, Reg. Not like you. No, I'm going to do what is right."
Regulus snorted with contempt. "You Gryffindors, always doing the noble thing." He shook his shaggy black hair. "I pity you, brother.Traitor."
Sirius smiled, then. A broad, satisfied smile that spread across his face with the ease of someone who was all at once very handsome and confident.
"Do you really?" he asked mildly. "I don't. I'm quite happy, thank you. At least I can sleep at night, knowing that I'm doing something to stop the cowardly murder of innocent people."

A flicker of surprise betrayed itself across Regulus' face, and Sirius nodded, satisfied.
"So tell your boss 'no' please. I'm quite satisfied in my choice. It's quite… liberating, to do the right thing. So thank you all the same, but no."
Regulus' face curled into a snarl. "I'll see you on the battlefield, then, brother," he hissed.
Sirius blinked, betraying no sign of alarm. In fact, he was still smiling as he shrugged, amiably.
"If that's the way it has to be."